It's never been about convincing Cersei. It's convincing Jamie and the other lords. If they see the threat, they'll join.

It's not a comic book movie. It's based on a novel.

Are we all basically okay with Barry altering other people's lives for his own selfish reasons and everyone forgives him? That's Kilgrave-level sociopathy - he was fine with getting together with Iris while knowing her father was a drunk loser BECAUSE OF HIM! He didn't stop because it was wrong, but because Wally was…