"speakers should be tuned to each individual’s ears"
No, hearing aids should be tuned to each individuals ears.
"Excellent tonal balance and wide, pinpoint soundstage! Bass was tight and articulate and seemed to be coming from everywhere, but well integrated with the music, band, performance. Never boomy or out of control. Crystal clear highs and vocal midrange brought the band into the room, or, when my eyes were closed, I was transported to the venue. In my opinion, Chuck has achieved audio nirvana- that thing about being drawn into the music and hearing more and more detail, hearing the inflection of the voice whether it’s pain, joy, or spite (Cry Me a River). Horns were smooth, never harsh. The sound was wide and big, speakers disappeared."
That’s from a recent visitor who had a good time listening. That’s my speakers (built and/or modified by me) and that’s my system. None of which was "tuned" to his ears, or mine, yet read the comments again- "excellent tonal balance." https://systems.audiogon.com/systems/8367
It is of course highly desirable to buy components and set your system up to please yourself. If not you, then who? But your idea of there being some perfect objective standard of right or wrong is deeply, deeply flawed. There is no perfect objective standard. Not for you. Not for me. Not for anyone. There are only myriad subjective standards from which we all pick and choose and compromise and balance as best we can.
When we do this well we generate comments like the one above.
End of story.