There's a whole host of systematic reasons why women (as a group) might choose not to pursue a CS degree. As a hiring manager I can choose to complain about the ~pipeline~ (which i conveniently can't change nor appreciably effect in the short term) or I can re-examine my existing assumptions (namely whether a CS degree is necessary for filtering).

I'm, personally, not really a fan of programs that are trying to shuffle people into a specific degree to improve employment representation rather examining what skills are necessary to do the job in the first place. The university as proxy for job training model, I feel, is perverse and doesn't necessarily serve students nor employers.

No, women are not less capable of getting a degree.

Instead, the problem is often that they have such a bad time, in those programs, due to the existence of a toxic culture, that they don't want to put up with that crap, and instead leave to get a job in industry that has a less bad culture (because they have other options).

Unfortunately, toxicity on all stages of the pipeline tends to drive out people who would be good engineers, but instead decide to do something else, because they have alternative options that don't suck so much, for cultural reasons.