Because it matters quite a bit for what sort of damage a person will do, what their overall character and their motivations are. Stalin is different from Hitler is different from Tito is different from Andrew Jackson is different from the kid from "It's a Good Life." Trump's a little bit unprecedented in terms of how incapable he is on a personal level as contrasted with the almost unimaginable power he wields. It's relevant for talking about what sort of damage he will do and what options people have in terms of resisting it.

It seems like this is one of those internet arguments where I'm agreeing with you, and then trying to add something else the scope of which is a little different from the thing you're saying, and then you're saying "NO YOU DON'T GET IT [repeating the original point I agreed with]" for multiple messages. Like the only template you can understand is if someone's response is "Oh yes you are correct and I have nothing to add."

Good luck with future conversations, I feel like you must be fun at parties.