Not all hearing loss is caused by shooting.
I worked in a high noise area in the miltary.
Most men, especially older generations, have more loss on the left than right. This is/was due to driving with the window open. My left also has less definition than right.
My first hearing aids, about five years ago, were pretty much useless and I seldom wore them. Recently got new ones that are great. Sound is very natural and they are comfortable.
I am very careful about protecting what I have left of my hearing. I carry two foam plugs in my pocket at all times and use them whenever I am near loud sounds. (shop, lawnmowing, shooting, etc.)