Also, romance writing and fiction writing as a whole (self-publish or not) is dominated by women and the hustle they need to do requires a ton of determination and business sense.

Would you say women are pursuing nursing because they want to be the best nurse in the world? That is the kind of behavior I'm saying you see more in men (as an average). I was under the impression that nursing is attractive because you get to work with people, it pays pretty well, you can do it with an associates degree, and you can have a good work/life balance. But yes, of course doing it well requires drive.

Again, the idea here is not "men have drive and women don't", it is "men by a razor thin margin are more inclined to doggedly pursue something to the exclusion of all else, which shows up when you're looking at entire populations and you've geared your society in a way where you elevate people that are the best at one very particular thing". A nurse having more drive than you isn't really the point. It is like when you say "men are stronger than women", it does not mean that any man will be able to best any woman in a contest of physical strength. Of course not.

Nursing requires continued certificate renewal and continued education. It's also competitive to get into any nursing program, so much so that you indeed need a lot of dogged pursuit to get in.

Also, as mentioned in a sibling comment, it used to be that you could find a single authoritative hosting of this lecture/essay, but now it's been ... adopted by the internet. I'd recommend googling and checking sources.

However, statistically men are more likely to be the breadwinners while women are more likely to have the luxury of "better" choices.