The development of male features in foetuses is triggered by a massive release of testosterone. The second stage of gendered differentiation, puberty, is similarly driven by the release of sex hormones in both men and women. Noticeably, adolescent boys with a malfunctioning endocrine system do not display typical male features (lowered voice, facial hair, etc), lesser tendency to masculine psychology (like risk taking and aggression), and don't develop sex drive (straight or gay) unless they start taking injections for life. It should be uncontroversial to say that sex and gender differences, both physiological and psychological, are tied to hormones.
Next up, the brain: the most complex and expensive organ we have, a complex system of feedback loops, again driven and regulated by secretions of hormones and peptides and so on. To say that evolutionary psychology is false and just anecdotes, you'd have to argue that, despite all the other visible changes that sex hormones make, somehow, the brain is entirely unaffected by all of that. That gender is mostly (or as some claim, entirely) a social construct, determined by something as subtle as a tone of voice or the presence of 'patriarchal gender roles'. Even though studies show children and teenagers are more affected by their peers' behaviours and attitudes than their parents'. Even though there is no culture where gender roles are truly swapped, and the 'Norwegian Gender Paradox' remains true.
Not only does the science show nature plays a significant role in the "nature vs nurture" debate on sex and gender, but policies based on denying it have failed to work.
I'm not an evo psychologist, or a biologist either. But it seems a lot more reasonable to me than what's coming from the supposed equality camp.