The model was trained by images are scraped from the internet.
Go on any art site and type in "woman" or "man" and you will see a difference.

And I'd argue that it isn't 100% males who are the cause of this.
I've stopped facebook and similar social media a while ago, but from what I remember, except for one or two gym bros it was mostly women who posted pictures in which they were scantily clad.
They won't upload pictures of themselves that they don't like for their friends and family to see.

People post what they like or find interesting on the internet and that's what AI's learn.