Basically everything she says seems to be telling on herself, but I want to note two things:

If we're splitting hairs about what cis men and cis women (because that's who she's talking about) are "built for," the latter have several advantages in long-term endurance, contrary to what she seems to be suggesting. Her entire ideology isn't that cis women are "better at different things" like misgynists always say, it's that women are strictly inferior except that they can sexually pleasure men and bear children, which is what those misogynists always mean.

As the other commenter said, it's ridiculous to say that child-rearing is less exhausting than 9-5 jobs in general. Like, you don't need to be a parent to know that. I couldn't be further from one and I know it. I don't understand how someone can come to this conclusion except by a) having a bizarre amount of distance from anyone with young kids ever and b) having such immense contempt for women that you see that something "should" be the job of a woman and think "Gee, must be easy then."