I think defining womanhood is actually quite difficult. We can’t really use the ability to nurse, because everyone has the ability to produce breast milk. We can’t really use the ability to bear children, because infertility happens and people already suffer insane emotional trauma about feeling like they’re not really a woman because of difficulty conceiving. (Also this means people stop being women during menopause or when pregnant??) We can’t even really use chromosomes, things like androgen insensitivity exists.
Biology is just really really complicated, and trying to simplify it is unscientific imo. We don’t use women as a category in studies for good reason, and when we do describe the sexes of the participants we have to also include contextual information like age, health status, and ruling out conditions like pregnancy or hormonal disorders.
(I don’t really want to comment on the rest of that spiel. I just wanted to point out, as a biologist, that biology is really hard and the narrative that it is simple downplays my field.)
