Earlier quoted context omitted.
The supply of women with related degrees from uni is too low. If only 20% of the candidates qualified on paper are women, then a perfectly blind hiring process would result in 20% women. Expecting something else implies some fundamental misunderstanding of math.
20% is (coincidentally) the percentage of CS degrees awarded to women. They get only 10% of entry-level software jobs. We don't get to blame supply until those numbers match.
That is nowhere near what I encountered in my large engineering school. CS101 was probably 33% women, but after a month, we were down to about 15%. By the 4th year, maybe 10% at best.
From what I can see based on many of the millenials I now interview, there is a huge difference in degrees based on school, much more than before. It seems like many low tier schools are pumping out degrees in any field as long as they've paid the inflated tuition. I don't consider a CS degree that didn't require a few semesters of calculus, algorithms, learning C and assembly to be valid. But it appears this is now common for these 'CS lite' degrees.