A central premise of the gender-critical philosophy is that gender is cultural, historical, societal, and is the product of external impositions.
This argument is usually made because we recognize that stereotypes vary over time and across geography. There may be some general patterns that do not fluctuate as much, but there is no evidence to support that it is definitely due to nature over nurture. In any case, the statistical means for patterns of behaviour are so close, with significant overlap in the populations, that it using "gender" to tell us of a person's sex is not very helpful.
I fully support and WELCOME gender non-conformity, because I think these systems are stupid. But how you relate to gender doesn't change your biological sex.
Gender ideology says it is something innate, which means you have to re-define your very identity according to how you relate to whatever it is we know as "gender." And if you are going to deny the stereotyping that goes on with the gender-spectrum teaching for children, then you ought to do some research.
Here is a quote from transactivist Jane Fae, as to why she knew she was a woman:
...Jane says felt she had to 'invent' a male persona to fit in, but at high-powered meetings would feel like a 'shy teenage girl', avoiding the dynamic males and gravitating towards the few women present.
....
'I've always been very feminine and sensitive. I like doing traditionally female activities such as cleaning, ironing, cooking and washing up. The emotional intimacy of love-making has always been more important to me than the physical side.'
www.dailymail.co.uk/femail/article-1252462/Andrea-Fletcher-devoted-fiancee-whos-sticking-man-John-Ozimek-despite-fact-wants-woman-named-Jane-Fae.html
This is why I think you are the one subscribing to sexist theories. The idea that a middle-aged biological male can even know what a teenage girl feels like, or thinks that an affinity to housework somehow confers a claim on the title "woman" sounds far more offensive, to me.
But again, believe whatever you want. I just don't buy into the theory. Sex is my baseline. Not gender identity.
Again, please stop derailing this thread.