Refs are doing it on purpose. They only call it in the softest plays and then completely ignore it on the worst offenders

Bron threw himself backward before the contact arrived. It was actually bad.

If they call shit like th8s Joel Embid would foul out every game

He’s done worse than this

That’s not a criteria with any value though. If you get caught stealing a bike, you don’t get to argue that you’ve stolen a car and gotten away with it.