This is a great point about matriarchal cultures in fiction. They are always just completely opposite of our culture, as in “women fight and hunt, men stay home and care for the babies”. Worldbuilding-wise, it makes no sense, here’s why:
Source: bemusedlybespectacled
I’m reminded of Dorothy L. Sayers’ essay “The Human/Not-Quite Human” in which she imagines males and masculinity being regarded the way females and femininity are (or were in her day, mid-20th century). There’s a recommendation that men’s role be limited to “gun-tail, plough-tail, and stud” (counterpart of “Kinder, Kirche, Kuche” for women).
There already are and have been matriarchal cultures throught history one could study for research as well