People can rail against the CNT's methods and ideology all they want, but in the end every player's destinies is up to them. The player that rises to the top gets catered to, those that cant; get fewer chances and cater to others. It's a microcosm of the world at large.
Sun Yang's career trajectory is up to him. The reason CNT is fielding him at the WYC is because he's arguably the BEST 15 YEAR OLD IN THE WORLD. His task is to keep that up at the senior level.If he can bring forth new tactics, attack ferociously and beat all the players in the world consistently, He'll definitely play in the majors. If he can't do this, and ends up being the run-of-the-mill "good chopper" due to the limitations of his style, He'll mostly serve as practice for whoever the Chinese has that can beat the rest of the world consistently.
It's all in his hands.