Be careful - the pedantry police will put you up against the wall for using break.......While i agree with you on the muzzle break side of things, I understand fully why hes looking for ear protection.
Im guessing you dont suffer from tinnitus?
My ears ring all the time now, but you get used to it. If I fire a shot with a moderated rifle without ear protection, my tinnitus rings far louder, and at a different pitch for days, sometimes becoming unbearable. I wholeheartedly understand where hes coming from, something you cant relate to unless you suffer from it.