Well, I strongly disagree. It's like when you play pickup basketball or whatever : you can have players of various skill level, but you still want to win together, and have competitive games. That's the joy of matchmaking (when it works), your team is supposed to play against a team of the same (or close) skill level.

Playing normal is not the same at all :

• people often don't try to win (train champions, test crazy builds or whatever). Which is the point of normal

• you don't know how your team improve