It is very abundant and has a very friendly climate relative to a great deal of the planet.
By friendly climate, I don't mean pleasant 72 degrees year round. I mean you don't have to spend all summer chopping wood, and preserving food so you can survive through the winter, which is a vast swath of the planet.
Wikipedia suggests the Bushmen need to store nuts for the winter, and during early spring the only available food is game (all the plants are dead). But great point about not having to deal with snow.
By friendly climate, I don't mean pleasant 72 degrees year round. I mean you don't have to spend all summer chopping wood, and preserving food so you can survive through the winter, which is a vast swath of the planet.