You’re still making them do something they didn’t consent to. They will still chew on bugs and small prey animals (when they get access to them, which isn’t often for indoor cats), because it’s etched into their behavior. They will take every opportunity they get. You can’t make a cat vegan, you can only force a cat on a vegan diet. Can’t you understand the qualitative difference there?
No they don’t, real wars and conflicts do.