One average bull contains 500kg edible meat. So, if you live in a tribe of 350 hunters in a warm place with a clean river where clothes and shelter are optional, do you know how much you need to work?
HUNT 1 BULL A YEAR!
If you want to have women and children who do not work, then you need to hunt 2 bulls a year.
How much more miserable a life would that make than it is today?