>STEM fields, especially applied rather than theoretical ones, involve people as much as things

This doesn't negate my point.

You're correct that I oversimplified: some STEM fields are indeed less 'biologically geared' to men. But the principle remains: biologically established differences in interest can very plausibly explain the differences seen in gender representation in some STEM fields. It is the assertion of this fact that has invited unfounded accusations of sexism.

>women are overrepresented in education and entry-level work, but still lag men in pay and advancement

That alone says nothing about the presence or absence of systemic discrimination.