It's a reason LeBron doesn't play much defense in year 15. As big of a fan as I am of both, Jordan was never asked to do as much as LeBron, ever. LeBron has to initiate the offense, lead in them scoring, clean the glass, lead them in assist, and play lock down defense. I know we all marvel at the way he takes care of his body. But at some point that heavy lifting will take its toll on anyone.