Sixpack made a great post. What I believe, is that any open player has the same physical skill set that any pro does. Where the pro has the edge is in the mental side of the game. The pros have learned how to win, they believe in themselves. Their ego is much larger than the players that are close but not quite there yet.
Those that don't see themselves playing better will automatically sabotage themselves to remain right where they are. And, all it takes is a little off on speed on that safety, one miss here and there.
The hard part is figuring out how to totally change your belief system in yourself. Even though in reality, it is as simple as just doing it.