A player at the top often refuses to play against a player who is much lower in the ranking for various reasons, simply because it is "not beneficial" for them.
As an example, consider the FIFA game rating: new players are always refused by those at the top, simply because it is a waste of time (although the game takes just over 20 minutes). What more can be said about our hours-long battles?
I believe that this is the main drawback, which may harm an innocent newcomer.
