i think you right because they talking about a group of people who have woman and children to take care so i think they rarely share food with other because they did not even have a lot of food for themselves
They did not have access to metal tools, they didn't build permanent homes because they had to constantly be on the move to find food, they weren't equal. The men were seen as superior to the women. SO that leaves you with the only option of RARELY SHARED FOOD WITH OTHERS. They didn't share food with other tribes because what food they had was barely enough to feed their own tribe.
