In hindi there is a saying "प्रत्यक्ष को प्रमाण की आवश्यकता नहीं होती|" ((bad) translation: The apparent does not require proof"). Look at any of the major figures in crypto, I don't see many "non white guy" people in there. Come on man, not everything requires us to do a study.
In journalism there is a saying, source your claims.
You don't need a study, but you need some sort of base to the claim.
Your anecdote tells us nothing, I know many non-whites who got rich from crypto.
Not everything requires a study, but when writing an article you should back your click/race-bait claims up with facts if you just HAVE to put them in there. Maybe just leave it out since it wasn't relevant.
I'm sorry but I don't think people need to cite sources in every sentence for every word. You are not going to ask them to cite the dictionary for each word, would you? So there is a balance, and I think we are just conflicted on where the balance should land. I think this problem is pretty apparent and you don't. What I can't figure out is are you just rules lawyering at this point or do you actually believe its not a problem.