Yep, it's a harsh world for feet. I don't think I'd want to go bare everywhere outdoors. But I think it's a cool parallel with ultralight philosophy... Part of it just getting back to the basic understanding and mechanics of walking, and also to think more consciously about the shoes we choose, and how they affect other parts of your body besides the feet. Kind of like when selecting gear, you add an ounce here, a little reinforcement there, an extra something to compensate for that other thing, something more for fashion's sake... It's all a system.