Is that not what the Annulment would accomplish in the long run?
If people want to say that the Circle system is to the benefit of both mages and non-mages, let them see (and feel) what happens when it is run incorrectly.
Well, it WAS run incorrectly, and that resulted in Kirkwall's mess. Even the Seekers weren't actually doing the job they're supposed to do.
Before anyone says anything about Cassandra saying that Lambert and the Seekers felt that Meredith was justified in her excessively harsh actions in response to the mages and magical abuses, the secret book shows that the Seekers were a direct source of corruption in Chantry and templar and Seeker ranks, which is a problem when their very job is to seek and root out all corruption in the Chantry and Templars in the first place.
And it wasn't even limited to the Gallows either. It affected the entire populace, and the rippling effects of that went into the White Spire during the events of Asunder.
I think the largest problem with the whole situation was that people were not approaching the problem of how to handle magic with the knowledge that mages are people too.
Yes, this mage may have been discovered by accidentally killing her father at the age of 5, and while that is an example of how dangerous untrained magic is, people gloss over the fact that the emotional and psychological trauma the young mage has to deal with with the knowledge she killed her father by accident. It's not malicious as the mob in Asunder seem to think. That the mage who was discovered did this so they must be evil or meant to do it and completely disregard the impact it has on the mage in question.
Mages are people with very real emotions, and I think that sometimes gets overlooked in these debates. People see the danger and not how to help the individual.