IMO, morricab's post was excellent.
Pessimistic? Well, that's in the eye of the beholder. Dedication, perseverance, persistence, soaking up info from multiple sources and venues, etc, are all indicators of hard work including analysis, evaluations, repeated experiments, do-overs, etc. I suspect some-to-many may perceive this as pessimistic. While, on the other hand, some-to-perhaps-few see this as an extreme form of passion or love for a given endeavor.
One life lesson high-end audio taught me (learned all on my own) was that extreme results can only occur from extreme efforts - Never by token or half-assed efforts. Perhaps that's the case with developing extremely well-trained ears or becoming a Nikola Tesla or Vincent Van Gogh type in their given industry. As morricab implied, every industry is filled with hacks, bush-leaguers, and also-rans and only a few rise above them. And high-end audio is no exception. In fact, I would attest that it's worse in high-end audio because the hobby is soooooo frickin' subjective and that includes the resulting measurements that some live and die for. What's perhaps even more pessimistic is, there's only room for one at the very top. Such is life.
But I also think it important to note:
1. Morricab makes a distinction between talent and skill and that was good because that distinction also applies to every other industry as well. Very, very few of us were born with the talent to accurately perceive and interpret what we hear. But very few of us with reasonable or better playback systems are unable to develop the skills to make up at least some of what we lack in talent.
2. As in every other industry, there are varying degrees of talent and/or skills. People routinely interchange the terms golden-ears with well-trained ears. I never use the term golden ears but I do know somebody who has the most well-trained ears I've ever encountered. Others I know with very well-trained ears don't even come close to this guy and compared to others, he is or was a relatively newcomer to the industry so maybe he had talent. Fairly incredible to observe actually.
As for me personally, I like to think I can hold my own with well-enough-trained ears. That may not be saying much but this much I can say: When Morricab says, "99% of the systems I have heard convince me that the owner of that system has no clue how to do this and it doesn't matter if he has been an audiophile 2 weeks or 30+ years." he ain't just a woofin. And I've heard many systems.
I'm tempted to respond to this in just a few words, but I suspect we'd be venturing down a whole nuther rabbit hole.