That was true in 1964. It was no longer true around 1974. Because people like me bought those records ( ten years before I did this ) and learned how to play off of them.

That's part of why Tedesco was much less employed and Hal Blaine was working as a ... security guard(?).

Lumpy on the beginner guitar newsgroup (alt.guitar.beginner) wore out Ovations for a living at some time around then.