Stingreen, agreed, up to a point, I often do without them. But with "high frequency hearing loss" - which means above 2kHz, when we're talking about hearing aids, which is around the frequency of tweeter crossovers - without hearing aids, cymbals do not shimmer, overtones are not heard, and so on. Behind-the-ear aids affect only the "high" frequencies, there is a big difference between the top-of-the-line aids and the others (my Oticon 10's have 10 bands of eq, vs. around 4 in many starter models), and they keep getting better.
You could of course eq your stereo, but then it's unlistenable to anyone in the vicinity, and hearing aids, being less susceptible to some of the other variables, may produce a more "natural" illusion.
You could of course eq your stereo, but then it's unlistenable to anyone in the vicinity, and hearing aids, being less susceptible to some of the other variables, may produce a more "natural" illusion.