I think I can owe my relatively good health to the fact I played outside a lot as a kid, I used to actually walk around barefoot a lot, too, my feet developed big-time callouses, so after awhile walking around barefoot was nothing.
Up until the 60’s humans have always “touched” the ground. In the 60’s rubber shoes were invented whereas before that all shoes were conductive (leather pretty much). We MUST touch the earth to have any chance at holistic harmony.