Humans are complex beings. Is interest in a specific field or profession a function of only gender? Would not the surrounding environment, role models, religion, books read, experiences in life and various other countless factors affect a person's interest and character?
I don't think he was wilful. He was wrong to reduce a complex subject like human interests and behaviour into a simple statistical function.
This is a laudable goal only if gender isn't used to discriminate against candidates. Discrimination on gender and race is wrong, period. Discriminating against men, whites, and Asians is still discrimination, and is not ok.
Nobody's going to disagree with you that environment and the individual play a strong role in affecting one's character. These straw man arguments are getting old.