"Nobody plays human" is also a lie. A couple of years ago, one of these studies found that the most common character created for online play on a certain platform was a male human cleric.
This left the wokists sputtering with outrage. They think that's a sign that D&D is Nazi. "Male (presumably white cis) human CLERIC (religious conservative)" is their version of how other people would have imagined if the typical D&D character was Jeffrey Dahmer (who is now apparently a misunderstood victim in the Left's eyes).
So of course the call for Grey Goo character creation rules is also specifically a call to ban the Male Human Cleric. Its a declaration of war against the people who like that kind of character: the archetypal character, the heroic character, the character that means something other than "a celebration of individual identity and sexual/gender expression".