More women attend and graduate from college, the root of the “progressive” movement.
It’s certainly possible that college/university indoctrination is a factor, but I also suspect that the popularity over the last couple decades of sites like Facebook, TikTok and Instagram have played a role. Significantly more women than men are engaged in following their friends, acquaintances, celebrities and “influencers” on social media. These sites have echo-chamber as well as brainwashing effects, as leftist views are disseminated while conservatives are attacked.