because he doesn't care enough to be bothered at crafting good lies. he just figures that if he says it, enough people will go with it, for it to be a useful thing to say.

Also quite comfortable with it.

JD Vance is so weird. Every press interaction he runs through all his practiced facial expressions, often inappropriately like a poorly synced robot

I’m not entirely convinced he’s lying, that would require knowing and understanding the truth. I think he’s just incredibly stupid; more dumb than trump, if possible.