honestly thats the way the game has always been. LBJ attacks the basket, the chances for contact are much higher when driving to the basket i know this from experience. Durant doesnt really drive a lot, and when he does he jumps over everyone else, where LBJ just powers through. Durant is probably a MUCH harder person to officiate.
Thats not an excuse, but thats how the game has always been. In contrast , Derrick Rose gets the absolute shit kicked out of him, but hes a 6'1'' guard, hes tiny, they let him take way more abuse.