Women representatives push 3 times female-focused legislation as men do.
That's a pretty high margin vs. anything else that might happen. Why would women not vote their interests?
Strangely enough, while it would be a no-brainer for blacks or Hispanics to vote for candidates who represent their interests or Catholics to find candidates for their interests, or the LGBT community to find candidates for theirs, the comments in the article suggest women finding candidates who promote their interests is wrong.
Great that women are so self-sacrificing, no?
Their argument is roughly "why should I vote for Attila the Hun in a skirt?"
But that's not what the article says. It says if other policies are roughly the same, female politicians are still pushing 3 times the female-focused legislation as men. So if you care more about legislation that concerns women, like those "female" issues such as child care, abortion, rape protection, wage equality, non-discrimination laws, healthcare that deals with female requirements like proper birth facilities, senior care that women often handle, even paternity leave, and so on, ceteris paribus, vote the woman.
It's simple game theory.