'Good' hearing aids can be targeted to boost sound levels in areas where hearing sensitivity has declined, generally higher frequencies. Unfortunately, what they don't point out, is that the loss of hearing is often caused by 'wear & tear' over the years and boosting sound in the affected parts of the audio band, while it may for the moment make things easier to discern, will also create more wear and tear, just where you don't need it. In other words, you'll get deafer using a hearing aid (probably).

I've been deaf to high frequencies in my right ear most of my life. I tend not to notice it.