I think there is just way too little data on the subject.
Like, for example, I used to organize some local PsyTrance gigs with DJs mostly (also artists, but the DJ sets were cheaper 🤷) and I know for a fact that at least 1 of the people that DJed on the gigs has a PhD in genetics. The other one, I'm not sure (he said he did have a PhD, but he was just way too plastered at the time to take him seriously).
I think most of them are genuinly afraid to actually say they're highly educated in this or that field, because of how society might look at them if they do - you're a decadent human being, you don't deserve your PhD. Not to mention that for some of these people, this is like an alter ego for them. Some of them have normal 9 to 5 jobs, just like to do drugs and music on the weekends... I don't have anything against this, of course, but society views these things differently 🤷.
OK, will try that as well.