My son was complaining about how he can't seem to do well at the Junior National tournament to get a spot to go to Worlds, a friend of his from his league that was a girl said "you should just play as a girl, it's a lot easier there". I would think a good male(ish) player that decided to grow boobs would be at a pretty good advantage if he/she wanted to play after the change. If the advantage was fair or not, I'd say it was not fair to anyone else, but that is up to the "make everything equal for everyone not to hurt their feelings" rule makers to decide in an official way. No matter what you do, you are sill going to retain many of the features that make men more suitable for competition. It's like being a good player in a handicapped tournament that maybe is in the top 50%, and then all of a sudden you remove all the handicaps and the players you had to spot 3 games now play you even. All of a sudden you are the top player.