Those of you who play NBA 2K9 know that Yao Ming is unstoppable in the game. The only real way to keep him under a 30/15 is to get him in serious foul trouble. It's not the same, but take the same tack in real life and everything falls apart for the Rockets because Battier and Artest can't be quite the same on the wings, defensively.
Bill Belichick does this stuff all the time: Attack the opponent's strength. Don't take the easy way out. Make Yao work and get him out of the game, and thus, get the Rockets out of their game.