I'm reminded of average people who spoke out against rebelling against monarch's or government's arguing about them being selfish and talking as if they should be grateful for what they have and in fact have no right to ask for more.
Their will always be those willing to accept having their rights and independence trodden on in the name of protection, especially so if they have some modicum of power from doing so.
Take into account Vivenne's position in the circle as well as her support of the chantry, along with her vanity and it's easy to see why she was more comfortable within the confines of the circle.
the rebels of course back an idealism that's solely based around their own liberty, suggesting its selfish is like saying a fast ball is fast. people outside the circles opinions do not matter to the rebels just as the right of mages is not cared about those outsiders.
the line about reminding people why their scared of magi, well nobody was crying about the horrible confined conditions of mages themselves, it was "i'm scared of them lock them up" it matters not how they justify locking them up, to the Magi the only reason they are locked up is because the mudanes fear them.....end of story.
those unwilling to accept confinement no longer care about those outside it and why should they? to the rebel's their confinement is as much the fault of the average person of thedas as it is the templars themselves. and for those mage that supported the towers the greatest contempt would be reserved.
It is in fact lucky that Bioware have chosen not to go as dark as real life, If you look at the atrocities committed in the name of liberty against those who sided with their keepers even their fellow citizens its horrific, Vivienne likely wouldn't be in Inquisition but a ditch somewhere along the imperial highway.
From arson to beatings, to rape, torture and of course murder, lots and lots of murder. some of the punishments carried out by revolutionaries against their own people for supporting the other side are some of the most despicable crimes around and yet for the most part today these self serving blind rebels that only cared about themselves are celebrated by those countries that succeeded in their rebellion.
is mage rebellion selfish? yes of course.............. unless you support them then their your people fighting for you. then they are hero's. One man's freedom fighter is another man's terrorist, as they say.
suggesting they should consider the rest of society when it is the rest of society is what keeps them caged is suggesting they should accept the oppressive conditions they are in. bringing up anders and the hit on the divine also misses the point. Nobody listened to the mages or what they wanted.
these crimes came about because they were ignored, To them the crimes against them go unpunished. these weren't crimes to the rebel's but protests, forcing people to start listening to them. the rebellion came about because even these protests were met with more oppression. the circle was always doomed to fail because people generally will never accept being ruled over by others, not matter how necessary the others deem it to be.
the fact is to the Rebel's Vivienne is the one who is blind and detriment to her own people, a traitor in fact. the problem is we have a habit of looking at things from a 21st century point of view, one where people accept less rights and freedoms in favour of security because of the comforts it affords us. But the less rights people have the more militant they are about them. history is riddled with rebellions that today are considered nuts.
hell the us war of independence started over the rate of taxes to pay for a war they demanded. removing yourself from the situation makes the whole thing sound stupid. but the reason was because they had no say in paying those taxes it was a right denied to them.