Earlier quoted context omitted.
You might be surprised at how many famous professional musicians don't read music notation. Outside of the classical world, session work, and jazz fake-books, it's far from de rigueur .
It's one of those "lies programmers believe" kind of things - we like to think that there is one definitive "notation" of a piece of music - but even when there IS accurate sheet music, it only tells part of the story. Music before recordings was much closer to jam-band style than people realize; and in the Middle Ages you could hear substantial differences in the same song just by traveling a few tens of miles.
Now, I had learned music theory and sheet music, which immediately disqualified me from a career in punk rock. But the music store sold modern pop music as well. It wasn't long before I had Tina Turner, Billy Idol, and Depeche Mode songbooks.
The Billy Idol songbook was especially interesting, as it included guitar tabulature. The text explained how Billy's guitarist, Steve Stevens, used novel techniques to achieve his sound.
Now I did not play guitar, so the tabulature was merely a visual curiosity for me, but me and my sister had some Casio keyboards from Toys-R-Us, in addition to my saxophones. So I would try and play the tunes I knew best from the songbooks.
But it was really weird, because when I played the melodies according to the sheet music, it didn't sound (musically) like the band on the radio. In fact, there was a Howard Jones song that would jar me into a Christmas spirit, because of a certain run of notes in a particular key. But sometimes the rhythms were approximated, or the notes were off.
I lost interest in purchasing these song books. I think it eventually became clear that the artists were not composing pop songs by writing sheet music, but someone with a degree, taking a break from their McDonald's job, was listening to the songs and transcribing them to conventional sheet music.
Many years later, I joined a large secular chorus of mixed voices. The sheet music we received included Rogers & Hammerstein, and John Rutter arrangements. That sheet music was exactly the remedy to restore my faith again, and my high school studies were finally vindicated for a life of non-profit volunteer service!