Becauuuuuuuuse the game doesn't give you that option?
I mean, jesus wept, dude.
And I get the idea that the Wardens are working with Cory from the scenes that explicitly show the Wardens working with Cory. Like, when they helped Cory set up Justinia for sacrifice. For example. Plus working for the Venatori, who are working for Cory. For another example.
He's never going to get it, mate. He's never going to understand that someone might take the view that killing the Divine is a bad thing. He's never going to understand that even if it was only because they were mind controlled, (were they really though, we know later ones are, but we have no idea about those particular ones, they could be there of their own free will), that having someone that's that susceptible to being taken over by the Big Bad
TM around to be taken over later might be a Bad Thing
TM because "Wardens are my heroes".
He's never going to understand that this isn't the first time that Wardens have resorted to Blood Magic and demons to deal with a problem, and that the last time that we know they did it, it didn't come out so well, reference Sofia Dryden, and that whole fiasco. I wonder, though, who was mind controlling them then? I'm sure that someone will find a way to say "But killing the Divine ended all Blights ever", or something equally nonsensical, simply to justify "But you can't exile them, because Wardens". That's why I let that dialog go. "By whatever means necessary" is supposed to be for ending a Blight, not overthrowing Kings, or trying to end the Calling. It's irrelevant that Clarel wasn't mind controlled, but simply duped, after all, "but Wardens".
We both know that other than the War Table, there are no adverse side effects to banishing the Wardens. We both also know that they can be recalled. We're not debating logic here, we're debating emotion, and people are way too invested in the Wardens as a whole due to the HoF. All they see, through the glasses of romanticism, is how they can't do any wrong, because maybe, sometime down the road, there might be a Blight. So what if they conspired to kill the Divine, the Chantry can elect a new one, but remember, Blight.