It does no such thing, because:
(1) STEM fields, especially applied rather than theoretical ones, involve people as much as things
(2) While in some STEM fields gender disparities are apparent from fairly early in career progression, that's not true of all STEM fields; in some (many of them around biosciences) women are overrepresented in education and entry-level work, but still lag men in pay and advancement (problematically for the “it's about men wanting to deal with things and women wanting to deal with people” explanation of STEM gender disparities, this leaves women dealing more with things while the men move to higher levels where they deal with people.)