Hiding match history + champion background in profile

I think hiding match history could be a nice addition to the game, I don't quite understand why we can't see another player's collection but we can see when he/ she is on a losing streak. Maybee adding an option to hide your own match history could be a nice addition to the game, just my opinion. I also think we should be allowed to choose which champion we want to be in our profile background rather than it automatically being our most played champion.