A champion's "skill" is more than their kit...
I keep hearing things about how autoattack champions take "no skill." I am bronze 4; I hear this ALL THE TIME in almost every game I play.
So if you still think champions like yasuo or vayne take no skill, play them. Play these champions for a few games. I guarantee, you won't be going 20/0 your first or twentieth time. It takes HUNDREDS of games to master champions like these, and if you ever get to that point you'll probably be in a high ranked division and not go 20/0 because you have harder opponents.
Okay, now: Go to a 450 IP champion that you have never or rarely played that you think is broken. Kayle? Annie? Garen? Yi? Whatever you think takes "no skill." Let's see how well you do.
Because champion skill is based almost entirely on "fixed" traits. These are traits that are applicable for all champs. Positioning, farming, teamwork. And when you truly master a champion, the champion's kit will be USED to accomplish these things.
I am bronze 4 and these are my thoughts. It drives me crazy when I see people say this in games like it justifies their death or losing lane. (Although sometimes I say this out of rage in the heat of the moment but only because I'm tilted as hell).