I didn't cite an exception. We have many instances of mages being allowed to leave the Circle temporarely.
Irving, Wynne, Ines, Bethany, Rhis, Adrian, Finn.
You just have to prove you are trustworthy.
And Wilhelm, who was allowed to live outside the Circle permanently (and who enjoyed terrorizing the villagers in Honnleath)
None of them advocate for the current version of the Circle and either hid from it or undermine it with the exception of Finn who doesn't provide an opinion IIRC. I don't think their getting leave or trustworthiness means that the Circle works well as is.
Wynne argues that the current Circle is necessary, and is instrumental in preventing Fiona's first vote on Mage separation from passing.
Edit: And Bethany has nothing bad to say about the Circle itself. She is relieved to be there. The worst she says is that some of the Templars are potentially bad, but that they are generally kept in check by those who are not.
You said Wardens aren't kept in circles, that's an exception. That's my question, if the Warden was a mage, after he/she saved Ferelden should they have been locked up?
So now we've moved the goal posts, if the mage proves trustworthy? I thought they were all a danger and should be locked up regardless.
Warden mages aren't a specific exception because Wardens in general are THE exception. Murderer, thief, regicide, mage, all are forgiven by the Joining. Wardens break the rules, so they can't be used as examples either way.
Tevinter is just one nation in Thedas, and not even the most powerful one. It shouldn't be assumed that giving mages equal rights will inevitably lead to a situation like theirs.
Debatable. Were they not locked in a death grip with the Qunari, they very well could be the most powerful nation in Thedas. As it is, they're at least as powerful as Orlais.