It has something to do with the fairness of matchmaking.

Basically, same level = same tier, which means we are competing with a user that might have the same performance as us and not against professional or highly skilled ones. It's more balanced and that's what PVP should be in the usual game. Tournaments should also have limits like there's only a minimum or maximum level or rank that is required to join. In that way, every participant has at least a chance to win.

P.S. Please don't multi-post. Just edit your recent post and include all your replies in those multi-quotes.