Critical listening is a learned skill, not some inborn genetic talent. I think anyone with healthy hearing should be able to tell the difference between good and bad if they take the time to learn to what to listen for, meaning anyone who can't simply needs to put in some effort. Does instrument X sound louder than instrument Y in this track, or are they equally loud? is hardly Kaballist esoterica.

I have no regrets about spending money on stuff that I use for hours on most days.