During this year's plague of males invading women's sport, I have seen a lot of women asking "How can they (usually meaning the International Olympic Committee, but also all the people supporting the IOC's decisions) be so stupid?"
I think Andrea Dworkin answered that question thoroughly way back in the 80's in her Pornography: Men Possessing Women
"A male masquerading as a female is dangerous because men cannot distinguish him from the real thing (thing here used literally, not idiomatically) a la Sarotte. The male will even, a la Larry Flynt, attribute some specious kind of superiority to the female to justify his cruel abuses of women in reality and in this context, remembered for a split second, mother was a saint. In the main, the abominable She is held responsible for everything bad, fearful, or alienating that ever happened to the fully-human-He.
Any assertion of female self leads to the inevitable decline of society; and when the abominable She calls attention to herself as human, not object, she violates the male’s most essential sense of masculine self. Every attempt she makes to reclaim the humanity he has stolen from her makes her subject to insult, ridicule, and abuse. In his view, she is not a woman unless she acts like a woman as he has defined woman."
Some men will pretend to be unable to tell the difference between male and female in order to avoid being labeled "homosexual." Other men will pretend to be unable to tell the difference because they know most males invading women's spaces are predators and they want to see a woman get what's coming to her. Still others will give a man in a dress what he demands because that crossdressing man must be in terrible pain to give up his manhood like that and as we all know, men are the only creatures that really feel anything.
The reasons they're all SO STUPID are as diverse as the manosphere they've created. They've had time out of mind to elevate their humanity by dehumanizing women.
It took sports governing organizations crapping on elite female athletes for men to notice. That's how f'in dumb the average, non rabidly misogynistiic man is - the sportsball had to be deflated.