This claim comes from 2 people, I would be a little more cautious about broadly embracing there claims of systemic discrimination, without actually knowing the corpus of research on the topic.
Also there claim of endurance being an important factor is suspect. Women have better endurance in that there performance drops more slowly than men, however the drop isn’t significant enough to result in any total advantage. Which is why women still lose in endurance competitions.
It’s fair to say that women probably weren’t significantly disadvantaged in hunting (especially smaller animals), but it’s quite misleading to argue that their endurance added some additional advantage.