I've always said dunking is an extremely dangerous thing
I'm surprised there aren't more injuries considering there is often one or more defenders and sometimes there is a hard foul
With a lesser risk the player also has to land safely. Again often in a crowded space
Even without all the defenders fouling, etc, simplying dunking the ball with the hard rim, being off balanced , etc has its hazards. Even LeBron hurts his hand on the rim multiple times