All the research into the limitations of human hearing is invalid, because the test subjects were "normies" and not hand picked from the audiophile elite?
The few serious tests I've seen that accommodated this idea showed that the self-proclaimed "audiophiles" didn't fare better than Tom, Dick, and Harry. People who have had serious training (the no-fun kind) in detecting specific artifacts does better when the tests are aimed at those. No surprise there. And of course musicians find it easier to detect things related to their craft, even though it hardly ever correlates with enjoyability or preference.
Frankly, the notion, that the reason why people become audiophiles is that they have some extraordinaire listening talent that naturally makes them gravitate towards the hobby, makes me throw up a little in my mouth.