I'm a barefooter and the grounding thing sounds like bunk to me.

Now, my big caveat here would that one shouldn't confuse effects with explanations. Even if the explanations are pseudoscience, it could still work. But... you really do need to rule out placebo if you want to claim there's an effect.

(The other caveat is that if it's otherwise harmless, and works for you, then it doesn't actually matter if it's "just" the placebo effect.)