I know there's a difference in men and women, and that this difference is genetic. This means that men and women have different interests, different ways of solving problems, different ways to communicate with others.
Of course, plenty of people try to deny that, and try to fix a problem that doesn't need to be fixed.
I am not aware of any research which backs up that all perceived differences between genders in their interests, problem solving, and communication are purely genetic. I don't even know of any research which backs up it is mostly genetic. There is research which shows genetics plays a role, but the magnitude of this difference is very much in question.
There is plenty of research which shows sociological factors shape the differences in interests, problem solving, and communication between the genders. Once again, we don't know the magnitude, but we know with almost certainty that it is not 100% genetic. From what I have read, it is much more likely to be less than 50% genetic, and perhaps much much lower than that. That is why we push for societal changes and not just blame all of these differences on genetics.
Most educated feminists would agree the balance in STEM will never reach 50/50 because of slight genetic differences and the fact women are the only gender that can give birth. But just because we won't reach 50/50 doesn't mean we cannot try to improve the gross imbalance we have today.