I went to music school and can learn a tune/song/piece from sheet music, although I can't sight read as I just didn't keep it up after I finished school. All this learned knowledge came in handy exactly once when I depped for a well paying jazz band on upright for a few gigs about 20 years ago (even then it was mostly chord charts).
I'm currently reading The Music Lesson by Victor Wooten which basically throws all of that out of the window and is a happy revelation to me! (It's definitely a 'Marmite' read though I suspect)
I have no desire (anymore) to be a working musician, or even gig. I now just enjoy playing for the simple joy of it at home or improv jams with friends. The best therapy from life there is!
I'm not saying either way is best, both are valid, but personally I'm more down with Victor's way now.
It suits my personality, and time in life I suppose, much better. Got melodies coming out of my ar$e now anyway!
Old dude out.