I think there is a paradox in feminism that both relies on biology and dismisses biology in different moments.
Historically feminism was at pains to deny that women were to be discriminated against because of their biology - and that traits identified with biology were in fact social constructs. While there are clearly biological differences - they had been exaggerated to justify patriarchy. Women could be engineers, doctors, firefighters etc etc and had rights and agency and reason and autonomy- discrimination was fuelled by a circular arguments.
But in order to defend and promote equality there is a need to define who are the victims of patriarchy-(ie girls and women) so that they could autonomously define their oppression and determine their liberation. Women deserved autonomy to fight patriarchy. Feminism could clearly not be led by men.
I strongly support both these biological and anti-biological approaches incidentally - but it is contradictory.
I think the problem for radical feminism comes with an attempt to use the Marxist dialectic of class struggle to apply to the struggle of women (proletariat hero’s ) against men (bourgeoisie villains). But this dialectic fails to see that patriarchy harms everyone, and that there has to be a synthesis - a resolution- there is no final victory of a sexless society as there might be a classless society.
The same can be said for anti-racism - if it simplifies the struggle from one of struggle against institutionalised racism to black people versus white people. There has to be Black autonomy- but what does final victory look like? Unless ‘racial’ differences are biologically abolished- (and even though this is possible over time) how else is victory obtained?
The problem is systemic racism, patriarchy, environmental destruction - all maintained by capitalism. I think BLM get it. I think Socialist feminists get it.
But clinging to biological determinism offers no way out. We either abolish sex differences (preventing the birth of one sex to create a sexless society, by reducing racial differences in the world as common genetic characteristics in populations reduce as populations become less isolated)- or we discover equality regardless of biology!
My sense is the radicalism of the younger generation get this also - but are running up against an old guard, who fear that the autonomy they have nurtured and mobilised to win progress is under threat. And younger people react with evangelist passion to take away what is perceived as a road block.
And of course it’s mostly notions of sex, sexual exploitation and power imbalance that interfere with non-biological narratives. And there is as much social construction around sex and sexuality, consent and abuse, as there is around gender.
I don’t know what the answer is - can we only let go of biology at the final moment of liberation-or is it gradually let go as progress is made?
Either way - simplistic biological dialectic narratives of men v women, (or black v white, gay v straight, able v disabled) - offer no actual way out, just perpetual biological conflict.
But I have always listened to younger people’s perspectives because there is often wisdom in progress that is dreamt by less mature minds.
I don’t have any answers - and I’m not here to defend people with dicks in female toilets.
But I think these questions are not simple - and statements that women are women and men are men can harm people - including people born female - and it’s where patriarchy starts - not just feminist autonomy.