Shion breaks down, and Setsuna feels his heart tighten further. It wasn't unfair, or selfish, at all, not to Setsuna.

"I'm sorry you got put through that. But you don't regularly feel like that, right?" He snorts a little at the Squalo part.

"Look, I'm not saying it makes it okay, but Squalo isn't exactly a good person. I don't think you should feel too bad about that one." This makes him a hypocrite, though - Setsuna would still feel bad.