Psychologists believe that the more a young child practices helping the family, even starting as a toddler, the more likely they will grow up to be a helpful teenager for whom chores are natural. Early involvement in chores sets the child on a trajectory that leads them to helping voluntarily later in life. It transforms their role in both the family and community. They become a responsible, contributing member.
I can see this being true. Although my parents didn’t do the “hunt gather parent” method, I was doing chores from the time I was seven on, not for allowance but because I was a member of the family. My father talked often about making sure I wasn’t a “leech on society,” that I contributed in a meaningful way to my family and community. I’d say it has made a world of difference in my life and how I see the world.