“Seriously, this does not add up.”
As I posted, some people are more susceptible to the damage. And doing the math: 165db - 34db (best case as far as I know) eguals above the damage decibels.
I am 60 and had to start wearing hearing aids three or four years ago. I always wore plugs and/or muffs, but shoot about 200 rounds a week, plus for years I drove drag cars on the weekend with .032 aluminum interior between me and the headers. It’s not a big deal, the fun I had more than makes up for the inconvenience. Take your young son to the range! Take him hunting in Alaska and Africa.