There’s absolutely nothing wrong with acknowledging differences. The problem is when people are discriminated against or thought inferior due to those differences. We can still be women and men, and girls and boys - differences aren’t the problem, discrimination is
The pitfalls of acknowledging and acting on sexual difference are what got us into this mess, I think.
Back in the 1970s (I am a 70s feminist), the sexism and discrimination because of sexual difference was so extreme, that the way we got a lot of feminist changes was by denying sexual difference eg. equal pay. It was important to have all the equality rights.
But women (and girls) had to fit into a male-dominated world - more than that, we have to fit our female, sexed bodies, with our specific role in the reproduction of the species, into a public world (workplace, institutions, education etc etc) and a private world (housework, childcare etc etc) which had developed for centuries around male bodies, and their specific role in reproduction.
Women have to "become" men for many of the purposes of equal participation in public life and countering discrimination in all parts of our lives. We have to pretend that we don't menstruate or get pregnant, with all the real physical bodily effects of our sexed bodies.
I think this is why there is still such conflict around maternity leave in the workplace, for example.
For a revolutionary vision, imagine how we would organise society - work, education, families - around the female body and its physical requirements and processes?