Critical context - the author ( https://en.wikipedia.org/wiki/Howard_Georgi ) was a career physics prof. at Harvard University. He is very aware of how badly even attempting to speak more truthfully about some aspects of diversity, at a supposedly candid and off-the-record conference, turned out for Harvard's President Larry Summers ( https://en.wikipedia.org/wiki/Lawrence_Summers#Differences_b... ).

Reasonable assumption: He carefully self-censored in writing the article. Then ran it past several trusted friends, asking for their additional censorship.