It's based on a very stupid comment by Jann Wenner.
Instead, Wenner unwittingly showed the music industry’s not-so-hidden dark side when he was asked about why, in the book’s introduction, “you acknowledge that performers of colour and women performers are just not in your zeitgeist”. Wenner replied that “insofar as the women, just none of them were as articulate enough on this intellectual level”, while black musicians “just didn’t articulate at that level” of master.
She is writing about the hiarachy on music (particularly rock music) that places straight white males above everyone else.
Most people would take issue with Mr Wenner's comments, but because this is the proc, most of the comment will have to be of the "poor white men being picked on again" variety.
Hierarchy.