> You say that the article isn't music theory but don't bother to say why.
His response sounded kind of gatekeep-y to me. Kind of like an academic with theoretical knowledge, but no practical experience.
Many great musicians never learned proper music theory. Innovation comes from outside, not from inside the establishment.
Retiring from music due to RSI suggests practical experience.
Disclosure: Musician
Definitely gatekeeping. I'm no wiz by any means, but I've done (and still do) a fair amount of paid work (gigs, studio recordings, teaching, etc.) and I would not describe Grade 5 ABRSM as "very basic"
Music theory is a way of describing that cool thing you played, not the other way around