How is the Harrowing an open secret? The Magi Origin from DAO establishes that apprentices don't know what the Harrowing is, so unless you and Jowan are supposed to be the most anti-social apprentices ever I don't think it's as open as you think it is.
Mages- or at least some of them- know what the harrowing is in terms of 'the big test they have to pass.' The secret of the harrowing is what it entails, not it's existence- or else we wouldn't have mentions (including some item equipment descriptions) of mages who voluntarily took tranquility rather than do the harrowing.
We do because if they had explored the possibility they would have written the results in their secret book, the one Cassandra gets and reads after dealing with Lucius? She does state that they are emotional, irrational and unable to focus but promises to investigate it further.
Wonderful- it's like she's building off of what someone else looked into long ago.
Skipping a bit here and there to help reduce the clutter.
Would mages having Seekers be an issue? Say for the College of Enchanters, wouldn't cultivating their own Seekers to help them manage their issues be somewhat helpful? Immune to mind control and demonic possession sound like useful tools against blood mages to me.
Oh, yes, this would certainly be an issue- quis custodiet ipsos custodes.
Mages being seekers (if that's possible) is not itself a bad thing- so long as they do not dominate the Seekers- but the College of Enchanters cultivating their own brand of seekers, under their own control, would be a disaster in the making. Organizations are notoriously bad at self-policing, and the mages of Southern Thedas in particular have a recent and consistent history of failure in doing so.
In Thedas, the very relevant comparison is the Tevinter Templars. The problem with Tevinter's Templars isn't that they're mind-controled or suffer demonic possession- it's that they answer to the people they're nominally supposed to oversee. In the College, this is weak oversight begging for corruption at best, or actively building an anti-Templar force to resist external oversight and interferance at worst.
(Which, shout out to Baconer, is where I'm going towards.)
I can understand having an issue with mage self-governance but if it's going to exist than why not give them the tools to help them succeed?
Because of the issues with mage self-governance governance succeeding. Tevinter is an actually appropriate example of successful mage self-governance- in fact, Tevinter has done so well, it has the tools to succeed.
In the former case they would be agitating anyway since many mages considered tranquility an essential death, performing it didn't cause mages to go "oh, it's too late now, they're already tranquil, let's return to our normal lives". They would be even angrier because there's supposedly no way of correcting the problem, did the permanence of Karl's tranquility make Anders feel any better?
The cure provides some possibility that the issue can be corrected. Now the Chantry or Seekers can promise investigations into cases of corruption and those who are unjustly made tranquil can have it reversed. In my view this would lessen the animosity mages who were victimized by templars would feel toward the system. Instead of their friend being permanently lost and their hatred toward the system being justified, some justice can at least be served.
Here's the difference between us- you're thinking in terms of false positive, people unjustly tranquilized who will be healed, while I'm thinking in terms of false negatives, people rightly tranquilized but who will also have demands to be healed.
I also disagree that the feeling of victimization would lesson- but then, I've been with people who were accused of oppression and murder for shooting back after being shot at. In my experience, people still feel victimized if someone they know or care about is affected by the system for legitimate reasons. The option to reverse such a condition sustains and fuels such resentments- far more so than things that are fait accompli and allow time to come to terms with irreversibility.
Anders is a poor case to bring up- not least because he didn't know Karl's tranquility ahead of time. He was in the emotional reactive state. Years later, he really doesn't bring it up much- which is the point of irreversible things.
They may be aware of the fact that they were cured but not how. If you'll recall Cassandra was unaware that she had even been made Tranquil and then cured, until she read the book she had no idea. So mages who undergo the cure may not be able to replicate it.
Here's where we have to remember who's involved in this: Cassandra.
Cassandra isn't going to allow the Seekers to monopolize the cure ritual.
People may ask for all tranquil to be healed, but really that's predicated on the belief that the Harrowing is not a useful tool for testing mages. That's a different discussion.
Is the system's public trust truly built around the Harrowing? Nobody outside of the Circle even seems to really mention it, or even be aware of it's existence. I think the Circle itself is what people trust, not the Harrowing or Tranquility. When apostates run around nobody is thinking "has he/she been through the harrowing?".
I suppose I could have said 'institutional' trust. The harrowing is the key measure for allowing mages a greater degree of autonomy and freedom- harrowed mages get to leave the Circles more, rise to positions of power and authority, conduct research of their own desire, and engage in mage politics. Harrowing the universal proof of 'I've got this, you can trust me to handle the demons and not blow myself and everyone else up.'
Care to bring up such sources? I will grant that the abuse of the rite probably didn't occur in Lake Calenhad but we really don't know about the rest. And we know that there are hundreds of tranquil, surely not every one of them would have failed their Harrowing or asked for tranquility.
Your second point is predicated on the assumption that the rite should be used if mages are abusing their powers. And we know that's not what it's supposed to be for, it's only supposed to be used for mages who cannot control their powers and it's codified in chantry law that making a Harrowed mage tranquil is illegal.
The first point is on the rarity of unjustified tranquilities we see even in Kirkwall, with is the worst of the worst places of Templar conduct in Thedas. In Acts 1, it's mostly done by Alrik- who's explicitly avoiding orders, while we learn that tranquilization of mages is illegal under chantry law. Meredith gets away with it in Act 3 because of the defacto state of emergency and the fact that she's taken major political power in the city and is mad enough to not be worth provoking- in Circles where the Knight Commander is not mad, extraordinarily powerful in politics, or have the contextual excuse, Chantry law can safely be assumed to still hold.
You misunderstand the second point. Mage abusing their powers is irrelevant to it. You used a supporting argument that reversing tranquility would offer a deterrance effect on Templars doing bad behavior if their bad behavior leads to mages being de-tranquilized and empowered. The first question is 'is this true?'- deterrance is an iffy prospect at best, especially in time-delayed contexts like these. The second question is 'is it effective?'- as in, is this value of deterrance best or better achieved through other means?
I'm not even sure how to respond to that first point. Are you proposing that those unjustly tranquilized remain tranquil so that they don't have additional powers and legitimate animosity toward the templars/chantry? First how is that moral? Second how does that make the mages feel like their going to be fairly and justly treated by the Chantry?
You familiar with the phrase 'fiat justitia ruat caelum'?
The Circles are, at the end of a day, a security state based on consequentialism, not justice. Mages are segregated from mundanes because of bad history, real concerns, and realistic (and recently proven) fears. In order to manage relations, prevent certain political dynamics, and prevent harm to both sides, a system is put in place that exacts exceptional sacrifices on mages (and lesser, often overlooked sacrifices by mundanes). This is not done because it is inherently just, but because of the expected consequences if it is not done (which is a different sort of justice, and one that matters).
The system does not work perfectly. That is not desired, but it is expected, because no system can realistically be expected to work perfectly. What matters when a system fails is not that failure happens at all, but the scope and scale of the consequences. When the system does not work right, and people are harmed, the answer is not 'reverse the harm at all costs'- the decision must be weighed against the costs, and benefits, for both the person and those around them. If the cure is worse than the disease, then it's not actually a good thing.
I could, for example, point out that from the start the process of curing tranquility is not a guarantee, or even safe- that it entails real risk, regardless of demon possesion, to the mage and those around them during the period of being emotionally empowered with powers. The death of one other person, in this case, would outweigh all the gain- even as it would almost certainly lead to the volatile mage being put down as a menace as well.
I could also point out that you aren't even raising the prospects or relevance of the tranquil's point of view. I will be the first to say that I view tranquil as people- enough so that I would expect and want the consent of the tranquil before they be 'cured', just as I would before they be 'put out of their misery.' The person they once were may have hated it, and the person they might be might hate having been, but the person they are now is real, valid, and most of all present. They are, after all, the victim here- and if an unjustifiably tranquil does not want to be 'cured', I see little reason to do so.
But most of all, I would point out to the mages that if they are doomed to exist within a security state in the first place, I will not do them the dishonor of wasting their sacrifice with an ineffective security state. They are already required to give up many freedoms- I would not tell them that I will disregard their lifetime of sacrifices to gamble with their lives and the lives of others instead. Justice that can be metted out, should- perpetrators of unjust tranquilization judged as appropriate.
But I do not believe in justice above all else- I do not even believe it to be justice after a point- and that is what fairness often is. The compromise between restitution, retribution, and acceptance of what has happened.
Revealing the cure for tranquility was not really the issue in the first place, by the time Pharamond's research came to light it was far too late. Keeping it a secret in the first place was what did it in my opinion. If they had shared the possibility of a cure mages would have possibly been more trusting of the Chantry, or at mages wouldn't be so angry at the possibility that their friends are being made tranquil without hope for a cure. Of course the Chantry would need to actually do some work, instigate investigations into such corruption, the Seekers would actually have to do their jobs and not just ignore the breaking of Chantry law but in the end having unjustly made tranquil cured would have gone a long way to restoring the faith of mages in the system. If the Seekers hoped that the permanence of Tranquility would cow the mages into submitting then they got that horribly wrong, it only made them all the more determined that the Chantry and the system itself needed to be overturned.
In order- the past was set so revealing the cure for tranquility is the issue, people angry without hope for a cure are the sort who will be angry until a cure is given whether warranted or not, the Chantry does actually do 'some' work such as investigations, the Seekers do do their jobs, tranquility was a relatively minor part of the mages faith in the systems, and the permanence of tranquility was not to cow the mages into submission.