It's important to question the beliefs we're raised with, especially when seeking truth as scientists tend to do. I'm glad to see research like this, and especially the bit at the end of the abstract about examining prior conclusions that were influenced by patriarchal cultural bias. There's something about how hard this notion of, "men hunt, women gather and take care of children, in all human societies past and present" is to shake that has me reminded of something:

"Extraordinary claims require extraordinary evidence."

That heuristic is generally taken to be accurate among the scientifically literate, Carl Sagan coined it even, but it is deeply flawed. Cultural notions of ordinary define what is seen as extraordinary. An idea that is normalized in our society needs much less evidence to convince people of it, while one that goes against normality needs much more to even begin to gain traction. The concept is flawed because 'ordinary' is socially defined, so while it can be used to discredit obviously wrong ideas like the existence of ghosts, it can also be used to discredit obviously wrong ideas like the CIA using LSD to (try to) control peoples' minds. Pretty extraordinary claim, but it did happen. Maybe you see the issue with this heuristic, while the idea expressed is intuitive, it hides a sneaky cultural bias.

I think something similar goes on with ideas like the one this study refutes. It seems so clear in our patriarchal society that men and women are different, suited to different roles as we've been told so many times growing up, that the opposite concept is extraordinary. So you get scientists coming up with truly extraordinary explanations of why women are buried with hunting tools to maintain their conception of 'normal', and anyone who wants to refute it needs to go above-and-beyond only to still be met with skepticism.