I used to run barefoot most of the summer outside as a kid, I was actually surprised how tough the soles of my feet would get. I could step on almost anything and not feel any pain or get cut. But, the point really is that a single human "in the wild" won't last long, while a group of us are very dangerous.
This is often true for other mammals, and insects, and fish, as well. Animals often fare a lot better in a group, with group rules.
