I would have to disagree, i think a few could take the shot more or less unharmed and others would recover.
No one would take a hard shot right behind the ear and be more or less unharmed.
You probably know that our inner ear is what allows us to maintain our balance, but I don't think you understand how delicate a structure it is, or just how profoundly we rely on it.
suffer even slight damage to your inner ear, and your brain starts getting conflicting information about which way is up, and which way your head is moving. It would become very hard just to stand still on focus your eyes, much less move around, and impossible to defend against a fighter trying to put you away.