I truly believe that most anyone can develope golden ears.
But I also have to add that some folks may have better ears than others ,hence the ability of some folks to be able to carry a tune and others who can not-the tone deaf.
Iam a musician, so for the last 40 odd years I've trained my ears to keep me playing in tune,you know when things are off key.Some folks don't seem to be able to tell the difference.
Part of this was learned from experience,some taught from mentors and some self taught thru many hours trial and error learning to play by ear.
I think this early musical experience made it easier for me to become a more discerning audiophile, and I don't mind being called an audiophile,because to me that's the ultimate music lover.To me it's someone who wants to retrieve as much music from his system as he can, the emphasis being music.
If I wanted to collect stuff there are much cheaper things to collect than audio gear.
But I was also lucky enough to have a few audio mentors who helped me hone my music listening skills.
First of all, to get ears you have to use them.
That means listening to the music and not just having it play in the background while you text or read.You know the types who like to have a few brewskies and spin some tunes to chill out types.
Nothing wrong with that,but you'll never turn a poor system into a good one if that's how you view this hobby.
Then again enough brew and anything will sound passable.
Ever notice how the volume goes up as the quanity of alcohol is increased?
In the old days when I started,distractions were frowned upon.
You turned the system on, grabbed a few lps and listened to them,mostly in the dark and in solitude.
You listened for every little detail, and you developed an auditory memory of what was on those discs, you knew them inside out, which came in handy when you contemplated an upgrade.
If the old reference (could be any type of music and style)was found to have more detail, more hidden nuggets of information,then the new upgrade was deemed worthy of a cash outlay.
If it was the same or no difference, then no blood was spilt.
I do wonder if some of the folks who make it a habit to post that everything sounds the same or makes no difference to their ears are perhaps 1-less critical listeners, who only listen to the tunes for pleasure-2-have no musical apptitude or the gift of being able to sing in tune and stay in pitch-3-lack the concentration to focus on just one thing and absorb it entirely without distractions(ADHD could be an issue with some anti audiophile,non tweakers).
Or perhaps are all of the above and who don't care about anything other than if the music makes their toes tap.
If that's all that it takes, then you don't need to search out any gear better than a table top radio to satisfy you.
And you would be correct to state that the rest of us are all nuts.