A minimum of mastery points required for ranked PLEASE

New champion, new kit to learn, new bunch of players learning her in your ranked game. There's a normal mode, a bot mode and even one named PRACTICE MODE so why do people feel the practice in ranked? The guy who's picking Neeko a couple of hours after she came out is creating friction in the team just by declaring her champion because even if miraculously everyone keeps their mouth shut, there's at least one guy thinking his teammate is gonna feed hard (and he's often right).

Riot should establish a minimum of mastery points for a champion to be pickable in ranked. This ensures you your teammates has at least an idea of what his champion does and that he's not going to read what his kit is about for the first time in your ranked game.

I don't care if you can't test it at real difficulty in a normal game, you can do that once you have some experience. When you're learning to swim you don't get thrown in open sea for the first lesson.

By now i already know i should just stay away from ranked after a new champion comes out but thing is i shouldn't need to do that just because some blockhead lacks common sense. I may be biased but i honestly can't even think of a negative side to this measure.

I don't know, is it really weird from me to expect my teammates in the "serious" game mode to be serious?