It's because he's 7'6 and 310lbs so people have unrealistic expectations, they don't factor in the fact that he's slow, uncoordinated (compared to everyone) and can't jump.
How much do these high school-caliber refs get paid anyway? That is the 2nd or 3rd clear cut charge that the refs blew.
You know the Rockets are an unstoppable machine when the only thing fans of other teams can talk about badly with the Rockets is that Drew Gooden dunked on Yao.