Because one of the throughlines of post-war America has been the feminization of the public sphere, and there is a necessary and equal reaction to this trend (coupled with Overton window shifting as politics get more feminized)
What do you mean by "feminization of the public sphere"? Is this a reference to the #MeToo movement and the backlash to some of its excesses? Or a reference to the culture wars we've seen?
I mean simply that women are now more numerous and influential in institutions such as workplaces, government, academia, etc. This development has brought about all sorts of wide-sweeping social changes and reframed our political/social debates. Movements like #MeToo are just one example of many that could be made to illustrate this point.