hmmmmmmmmmmmmmmm gender abolitionism...
its a complicated topic with lots of angles to it. for example, some arguments you posed are terf / general transphobic arguments (like the he / she for sexes one - not saying youre transphobic by the way, just that thats an argument used by terfs and the like) - on the flipside, lots of nonbinary activists consider themselves 'gender nihilists' and want to do away with gender as a concept... but in a slightly different way
while terfs are 'gender critical' in that they believe it all comes down to sex - a concept and dichtomy which they think should not be abolished - and understanding gender outside of reproduction is like... bad or whatever (no im not giving terf ideology a neutral representation, im not gonna, its bunk). on the flipside, gender nihilists want to do away completely with the social constructs of male and female, especially legally to create a world with a truly nihilist view of gender - which i think is a valid goal that can be achieved in some nonbinary spaces, but would be incredibly difficult to implement generally. however things like the eradication of gender markers on ID is pretty conceivable.
i feel like this is a misrepresentation of most young trans people - it usually extends far beyond a child liking things their gender Isnt Supposed To Like and the parents deciding they must be trans, and actually includes expressions of severe dysphoria and self determination ('im a girl, mummy!'). transition (at least medically) for kids is approached with extreme care (social transition is like, 100% reversible though and i think a gender nihilist world should let kids vary their gender expression as much and as frequently as they like)
on the flipside, this does definitely happen now and then - more typically with tagging kids as nonbinary than as binary trans, for whatever reason. and the like, relationship between gender roles and gender identity is a fraught one for sure
luv it, but also think gender has been a social and psychological phenomenon across cultures and eras that would certainly be difficult to eradicate
luv it
socially impractical and inaccurate to the lived experiences of trans ppl. say youre meeting a trans woman at a restaurant and shes there before you, so you have to point her out to the waiter to find your table - do you say 'him over there' bc she has xy chromosomes, or would you say 'her / that lady over there' bc if you refer to her as a man the waiter wont know who youre talking about. despite what ppl like ben shapiro think, you really cant guess someones chromosomal sex at a glance - and thats all you get at a lot of people you need to apply pronouns to.
pronouns predate the entire concept of chromosomal sex and - like most of language - function socially far more than scientifically or biologically.
a far better argument would be eradicate he and she entirely and just refer to everyone with they - lots of languages dont have gendered pronouns at all, and their native speakers would jump for joy to know they never have to learn she / her / hers and he / him / his ever again.
this is true. personally im not very into the whole graygender / bigender / genderfluid / greygender / ad nausium thing. all those defintions and understandings of gender are valid (i often pull agender or genderfluid out of a hat when ppl ask abt me), i think gender is a lot more abt social roles, in which the simple category 'nonbinary' suffices - splitting things up into more and more roles and definitions doesnt aid a gender nihilist / abolitionist agenda at all.