The difference between soft & smart is Shaun and Marcus Allen. Allen never took direct hits either. He knew when to hit the ground and when to step out of bounds. But he played much longer than Shaun did..and looks today like he can still play. Shaun has been very vocal in admitting that he didn't hit the weights nearly as hard as he probably should have. He did his damage on God given ability.
You beat me to it. When he was a UA, his aversion to the weight room was pretty well-known. There's no telling what his career would have been like, had he taken care of his body, rather than depending solely on his god-given talent...