Love that bit about Wilt Chamberlain being a better free throw shooter "granny style" but then deciding not to do it because it looks silly. Then he points to everybody wearing running shoes for the same reason: just to fit in.
That's what I've also found is at the root of people not wanting to try barefoot. They'll say "what about glass?" or come up with other excuses like "I don't think my feet could handle it" but they really just don't want to be different.