I had to see an orthopedic surgeon when I was 13, because of my trouble walking. He determined I had a serious birth defect, most of the bones in my left foot all fused together. Interesting my parents never noticed, until my shoes began wearing out early in an odd pattern. Added expenditures always got their attention, even if I didn't personally.
I love my late parents, but they really were dreadful at paying the least bit of attention to me, a consequence of them both being totally career-driven, as early as the 1950s. At least it taught me to be independent early, if not a little defiant.
Well, anyway, one of the doctor's recommendations was that I walk barefoot, that he claimed was best for humans. This was 1962. I never did, though, considering it too dangerous.
A few weeks ago my golf instructor was ragging me about my left foot not assuming the correct position while driving. Finally I said to him: "Look! I virtually have a club foot! It doesn't move! Here, hit it with your fist! It can't move! I'm sorry I didn't tell you this before, but I never imagined my foot deformity would be a factor in golf."
"How did you have an Army career like that?" he asked me.
"Guts" I answered. "During Vietnam they would have taken me if my foot had looked like a duck's. And once I was in I kept it hidden."
A really nice guy, he modified my posture so my deformed foot could still allow for a good swing. (The main trick was putting my feet closer together than the experts recommend)
I don't buy barefoot running at all. Fine for primitives in the wild, bad for moderns on hard man-made surfaces.