if you don't want to get hurt, don't do combat sports, period.
this isn't ballet dancing or knitting
you could potentially kill someone with a strike to the head (or repeated strikes), you could kill someone with a choke, you could kill or seriously hurt someone with pretty much everything that gets thrown in that cage. I call BS.
I don't see any boxers whining about repeated shots to the head, even tho most of them end up with SERIOUS life changing traumas that completely screw their life after they retire.