That is profound. I mean really profound. But this is hardly THE reason. The medical community, while certainly deserving respect, is no longer seen as having all the answers. Chiropractors, Acupuncturists, Reike practitioners, Rolfers, Massage therapists, Spiritual healers and even Tappers are gaining growing respect with the public.
People can be quite flexible if their motivations are in place.
They don't have to believe it. In fact, as ridiculous as it sounds, they will find a way to believe it. They will make up a theory. They will write a book about it. They will even find a way to grow more hair in their arm pits so they can continue to pile up the riches.