This is what gender ideology is fighting to deny. Let's keep that in mind.
This is yet another example of what Helen Joyce's latest newsletter is going into - this being a "huge problem in a sane world".
She's recommitting to having said that in 2022, citing things like this as an example, and she's now going further - she believes the fully-manifested forms of this belief could fail Grainger criteria 5 (that Maya Forstater's passed on appeal):
"It must be worthy of respect in a democratic society, be not incompatible with human dignity and not conflict with the fundamental rights of others."
Paywalled, but I'll quote a bit:
So when I say a believer in gender identity might have a belief that is NWORIADS [not worthy of respect in a democratic society], I’m talking about someone who says gender identity is the one true test of whether someone is a man or a woman, and really means it. Someone who doesn’t just say “woman” means “people who say they’re women”, but who acts and advocates for the logical consequences. Who, if they were “assigned male at birth” but identify as a woman, would barge into women’s spaces and play in women’s sports, and who would, whether trans-identified or not, seek to get anyone who objected fired, blacklisted by the media and so on. Who thinks that children should be treated as the sex they say they are, and seeks to bring down the might of the law on any parent or teacher who won’t go along with that. Such people hold a belief that’s inherently rights-destroying, and incompatible with the dignity of others.
https://www.thehelenjoyce.com/joyce-activated-issue-70/