I’m also curious about the role pregnancy plays into all of this. Obviously everyone back then would need to help out in any way they could back then, but without contraceptives how frequently would women be pregnant? It seems like that would play the largest contributing factor into roles/responsibilities and the article seems to ignore that issue.

While today you could breastfeed while running a marathon, there wouldn’t be a way to keep the baby close by back then. Additionally, while for the first couple months a pregnancy might not impact your ability to hunt, eventually it certainly would.