You started your comment with
> The article makes a very strenuous effort to make a point about something something racism in rock that sounds a bit boring and trite to my ears
This is very dismissive.
Then in thread you follow it up with stuff like:
> So why didn't the black grassroots ever sprout an analogous new rock scene, instead of turning towards the mainstream, big stage, light show, for-profit music that comes from black artists for the last few decades?
They did. You are simply ignorant of it. A large part of why you are ignorant of it is exactly because they were fenced away from the distribution channel by powerful publishers that ultimately only wanted reproducible results within predictable lanes. Because of the flaws of American society those lanes were very much racially defined.
This is what punk rock looked like in the 1970s. Note it was both racially integrated and willing to put a black woman in front: https://www.youtube.com/watch?v=b6BHh_0pX_4
How did that very sort of new rock you demanded of black musicians disappear? Not because they didn't try, but because they did, and were fenced away from the means of reaching a mass audience vs the industry allowed white folk that played the same music, and even then white punk was fenced away in similar way (though not equivalent).
> Why Rihana and Beyonce, rather than a new Jimi Hendrix? Female, even. Why is Rock 'n' Roll pretty much dead to black kids, nowadays?
This again comes across as very judgmental, and an utter failure to understand what the article was telling you. You are blaming black musicians for not prevailing in a genre that was overtly hostile to them, when the people hostile to them held all the power. Then you're just asserting your own taste about Rihana and Beyonce.
Strike the phrase "female even" from your future discussions on this topic. No matter your intent that's going to read really wrong.
And specifically about Beyonce, I don't really see how you can watch this video and then assert she ain't punk rock as fuck: https://www.youtube.com/watch?v=WDZJPJV__bQ and that has nothing to do with compositional taste of the music. This is where black American music went exactly because of all of the issues the article is describing.
Jimi is celebrated exactly because he was such a rare achievement in that era. The true tragedy is there's 10k Jimi's out there that never got a shot because of race, no matter their interest or ability.
I'm trying to be charitable here, but so far all you've done is ** on black musicians you don't like, and then criticize the history of black music for not being what you naively expect. That's what I meant with my comment.