Not crazy at all; they fully know it's biologically impossible.
In the movie 'Neighbors', Akroyd forced Belushi - at shotgun point - to admit he psychically willed Ramona's (Akroyd's wife) towel to fall off so he (Belushi) could see her naked. Of course Akroyd didn't believe that, it was a power play to show who was in charge.
That's what's happening. You think these people can't discern what a woman is without being a biologist, or that they really believe a man can menstruate and give birth? Of course not. The goal is to destroy the meaning of language and thus distort reality to their advantage. It allows them to position bizarre ahistorical works of fiction such as 'The 1619 Project' as actual history and thus make the past and present what they want it to be. Reality can literally be shaped from thin air and imposed. And you - poor sap! - flail from one encounter to the next just to stay out of the crosshairs of people who'll characterize you as Nazi, racist/white supremacist (even a domestic terrorist parent of school age children!) and literally attempt to destroy your reputation, livelihood, and liberty via social media, corporatist cooperation, or full weight of a weaponized DOJ. This is fascism.
If you'll admit a man can menstruate and give birth, or that you can't say what a woman is without a biology degree, then what can't they make you say? In Orwell's '1984', it was termed 'Newspeak', language and history were whatever government said it was, and could literally change overnight. History and words simply disappeared or were inverted to mean the opposite - just as women are being disappeared in language (thus reality) today - and were replaced with a Big Brother-centric substitute. Mind control is the objective, to limit the range of thought.
These people are a uniquely American strain of Marxofascism. As of Jan. 2021, they control the United States government. They are purging the military, justice system, law enforcement, intelligence, etc. of conservative thought. Education has been radicalized for three generations and in absolute leftist control; that's the genesis of Marxism in America. Bernie Sanders is a lifetime, dedicated commie and could have been the Democratic nominee. The U.S. Congress and state houses are filthy with open and closet socialists. Think about that; people dedicated to an economic and political system that must destroy and replace our constitutional republic for their vision to occur, have actually been elected and sworn in to protect that republic.
Calling these people "crazy" or "snowflakes", etc gave them cover for decades. It diminished and dismissed their danger, clearing their path to power. They are intent, disciplined Marxists and fascists who are being rewarded with wild success. They're crazy like a fox.