Hunting allowed for a more protein-rich diet, so long as you could find something with meat to kill. By far the best hunting gig in the prehistoric world, incidentally, was fishing. Which is one of the reasons that if you look at the history of people populating the planet, we tended to run for the shore and then stay there. Marine life was A, abundant, and B, relatively unlikely to eat you. While we tend to think that the lives of foragers were nasty, brutish, and short, fossil evidence suggests that they actually had it pretty good. Their bones and teeth are healthier than those of agriculturalists, and anthropologists who've studied the remaining forager peoples have noted that they actually spend a lot fewer hours working than the rest of us, and they spend more time on art, music, and storytelling. Also, if you believe the classic of anthropology, Nyssa, they also have a lot more time for Scootalypooping.