Sex (not gender) and skin colour are not the same. You are essentially saying that because skin colour doesn't seem to biologically affect people in a certain way, sex doesn't either. That's a ridiculous argument.
It's not ridiculous.
What is ridiculous is the suggestion that education and career choices are biologically driven. There is no evidence of this.
And there is a significant difference between saying that people's behaviour is affected by socialization, and that poeple's behaviour is only affected by socialization. Again, if you are making that leap you have a problem, that's not a valid argument.
But your biological sex does not impact your career choices. Any difference in interests are on an individual level and are significantly affected by society and environment.
In fact, if you read what I said carefully, it's clear that I agree that socialization affects people's choices - that is why there is a difference between the choices women make in egalitarian vs non-egalitarian cultures.
The question is why the women in more egalitarian cultures, where girls are not only allowed to go into more traditionally male dominated work but are in fact wanted there, are seemingly, in your view, being socialized against making that choice. Whereas the girls in what are clearly less egalitarian - and let's be clear, often much more sexist, cultures, are more likely to make the choice to go into these male dominated areas.
This isn't the 'gotcha' moment you think it is.
There was some research a number of years ago which seemed to suggest that in societies which were considered more egalitarian women were making choices that reflected their interests and weren't choosing male dominated careers but it's not as straightforward as it sounds.
Some Scandinavian countries score highly when assessed on gender bias especially in relation to STEM careers and we know that countries with high levels of gender bias have fewer women working in male dominated sectors. This impacts things like pay, support for female stem employees etc.
That seems an extremely counter-intuitive claim being made because you have an a priori belief that all things being equal, women and men would have the very same interests.
I do believe that. I'm yet to see any convincing evidence that education and career choices are biologically driven.