Maybe skilled black musicians prefer rap, hip hop, or rock music? Despite movie myths about "band camp", I'm pretty sure rappers get laid a lot more than viola players.
"American orchestras remain among the nation’s least racially diverse institutions, especially in regard to Black and Latino artists. In a 2014 study, only 1.8 percent of the players in top ensembles were Black; just 2.5 percent were Latino. At the time of the Philharmonic’s 1969 discrimination case, it had one Black player, the first it ever hired: Sanford Allen, a violinist. Today, in a city that is a quarter Black, just one out of 106 full-time players is Black: Anthony McGill, the principal clarinet."
https://www.nytimes.com/2020/07/16/arts/music/blind-auditions-orchestras-race.html
"American orchestras remain among the nation’s least racially diverse institutions, especially in regard to Black and Latino artists. In a 2014 study, only 1.8 percent of the players in top ensembles were Black; just 2.5 percent were Latino. At the time of the Philharmonic’s 1969 discrimination case, it had one Black player, the first it ever hired: Sanford Allen, a violinist. Today, in a city that is a quarter Black, just one out of 106 full-time players is Black: Anthony McGill, the principal clarinet."
https://www.nytimes.com/2020/07/16/arts/music/blind-auditions-orchestras-race.html