I wonder how many of the people who claim that shooting without hearing protection doesn't really affect them, participate in audiology programs.
As a Naval Aviator, I had to undergo annual audiology.
I still remember the time an older flight surgeon looked at my test results and asked if I were a handgun shooter. I was surprised by the question, and asked him why he had asked it.
He told me that he knew I was right handed, and that the loss in certain frequency ranges in my left ear would correlate to a right handed shooter who shot a lot from a Weaver stance.
This described me to a T....
After that, I started doubling up on hearing protection at indoor ranges.
The point being, while people may claim that noise exposure doesn't do anything to them, they may simply be unaware of the damage they are doing to their ears.
Some of them may grow older, only to find they suffer from tinnitus, or that they lose more and more hearing in certain octaves.