IMHO, the main problem is black culture, which is thoroughly anti-intellectual, and which denegates academic achievement,or to use terms that used to be fashionable admires “right-brained” abilities and disdains “left-brained” abilities. Jews, of course, are the opposite. So lots of black athletes and few Jewish ones. Now I have fit musical talents into this scheme. Do you think it washes if I compare a musician like Louis Armstrong with one like George Gershwin?
I think the pattern remains. Armstrong was a fine performer. Gershwin was a composer. Different skill sets. Performance is a more right brained effort, composing is more left brained.
My personal, anecdotal experience is that I do better as a performer playing the trumpet than attempting to compose music. As a software engineer, I'm capable of composing thousands of lines of code in my head. It takes hours...sometimes days to get my fingertips to commit that code to actual files. I enjoy considerable ease in conceptualizing 3D structures and spinning them any way I desire in my head. That makes a variety of analytic tasks much easier. Eventually, that analog exercise on the right side of the brain needs to be expressed in a left brained manner to convert to a paycheck.