My understanding is that hearing aids help to slow hearing loss because they ensure that signals reach the brain. If the sound is not boosted and natural hearing is failing, then the nerves going from the ear to the brain weaken from lack of use. I hope the explanation helps.
My audiologist is trying to convince me that I should start wearing hearing aids because they will reduce future hearing loss. Is this true or is it just sales-talk?
I'm 76 in good health with reasonably good hearing - just some mild loss at 6k and 8k frequencies.
I don't know if it's important for you specifically.
In general, though, yes, it will help reduce damage later. It's kind of like wearing glasses....they help slow how much your eyesight degrade over time. Your ears won't have to strain as much to hear and you won't have to turn up the volume on things as loud (which would cause more damage), etc.