Rashard Lewis hasn't become a premier rebounder or shotblocker in the absence of serviceable big men in Seattle.
Ryan Bowen did not explode into a defensive superstar with all of the injuries to Tracy and Yao.
Al Harrington is bigger and stronger than both Marion and Gerald Wallace and he does't have better rebounding or blocked shot numbers than either, despite the lack of quality big men in Atlanta.
Carmelo Anthony didn't all of a sudden become a great rebounder and/or shotblocker with all of the games Kenyon Martin and Marcus Camby missed.
At some point, you have to give credit to players like Shawn Marion, Gerald Wallace, and Kirilenko for putting forth the effort and energy to do those things no matter who is missing from the line-up.