Changing Sex Chromosomal sex is not the entirety of sex. There’s also hormonal sex and anatomical sex. If anything, anatomical sex is the original referent of the word, from before we knew anything about hormones or chromosomes. And there are some people naturally born with a chromosomal sex that differs from their hormonal or anatomical sex (women AFAB but with XY chromosomes), and everyone has always referred to them by their anatomical sex (as we usually don’t know anything but anatomical sex about anyone).
Hormonal and genital sex can be changed already, and it’s only a matter of time before chromosomal sex can be changed too (hello CRISPR). — Pfhorrest
I think this picture of changing sex is insidious. A woman who has her breasts removed because of cancer is not becoming more male. A man with long hair is not becoming more female. There are two distinct sex categories male and female which are need for reproduction one produces sperm, the other eggs and the capacity to grow a baby inside themselves. (We all once lived inside our mothers) This is the sex binary and how we identify males and females. It is not capable being a spectrum.
An inverted penis is not analogous to a vagina or a functional part of a reproductive system. A phalloplasty or metoidioplasty are useless for reproduction and not anything like a functioning penis.
It is a bizarre maybe utopian fantasy that you can gradually change someone into the opposite sex. It seems the ultimate goal is to have some kind of machine where someone can enter and change sex instantaneously if they have the desire to live as the opposite sex and change back if they get tired of doing so.
But pandering to the different stages of this ideal, compromises peoples bodies and women's rights among other things. Sex stereotypes are attached to biological sex. It seems strange to be aspire to be treated like a biological woman whilst never having the biological reality that lead to said stereotypes.
On top of this there is not a unified trans ideology and a complete lack of coherent definition of gender and distinction between it and sex so that some people take on the moniker of woman with no intention of trying to biologically transition but seeing sex/gender id as apparently purely mental.