Don't have time to read it, but this is the reference from which that quote came from:51.5% of professional musicians?
Kenny, Dianna Theadora (March 22, 2015). "Music To Die For: How Genre Affects Popular Musicians' Life Expectancy". The Conversation. Retrieved September 9,2019.
I suspect that it is only hip-hop or gangsta rap artists, and such like. It's not like anybody has done in Cliff Richard for his music!