its not the only reason. There were quite a few times were Bush made very bad decisions catching the ball and being tackled for a loss when he should have done a fair catch. Other times, he was well known for catching the ball and trying to dance instead of running forward for a quick 7-10 yard gain. He would sometimes revert to an all or nothing run style. and alot of times it ended up as nothing, instead of taking what yards you could. You can contribute that to blocking all you like. But the decision on what to do with the ball rest on his shoulders.