Earlier quoted context omitted.
I mean, that doctors and lawyers were substantially less sexist compared to engineers in the 60's and 70's also strikes me as less than plausible, though I'll grant that'd be a closer competition than comparing them to engineers now. Do you have any evidence of an advantage there?
I am talking about relative levels of sexism in the present, not in the 60s and 70s.
That they may be less sexist now, after having achieved gender parity or something close to it, is hardly unexpected. Of course a field with roughly even numbers is usually going to be less sexist than one dominated by one gender or another.