Where to start?
First, to your (horribly sexist) implication that women opt out of the workforce by studying "Gender or Women's Studies": it isn't even in the top 10 majors for women. You know what the #1 major for women is? Business. http://www.forbes.com/2010/03/02/top-10-college-majors-women...
Biology, math, and physics are all also popular majors for women: http://www.npr.org/sections/money/2014/10/28/359419934/who-s...
Calling out "previous work experience" is similarly just so much BS. If women are excluded through systematic bias in hiring (hint: they are!) then they literally can't earn that experience. Furthermore there's a compounded effect, as fewer and fewer women make it up through each tier of the hiring/promotion filter.
Even the article you cited calls out gender disparities in academia. While only 22% of CS PhDs were given to women, they made up an even more minuscule 14% of CS faculty.
tl;dr: the system is rigged and women don't get a fair shake. Stop victim-blaming.