Being able to kick or ban players mid-game without a vote could get pretty toxic.
How is it different with kicking/banning them at the end of the game?
I don't see why you should wait till the game is finished to ban them other then giving them free reign the whole game to be a child.
You could just kick/ban whoever you thought was the imposter. Or you could ban anyone who disagreed with you. Trust me, that kind of power advantage over other players can get super toxic.
Kicking in lobby will not ruin someones game and kicking mid-game will.
That’s how different it is.