Who knows? It might as well be God until we figure it out. Or why not Gods? The idea is that modern science and methodology is great at observing, putting together and reporting everything physical, but there's a great deal we don't know about what people with no 'official training', no tools and no access to outside resources can do and always have done throughout history.
The most functional label I fall under as far as religion goes is 'atheist'. Still, skeptic as one might be, there's simply too many strange and unexplainable things in this world. Hands-on healing (and another I call 'hands-off healing') has been around the world and in many forms. Whether it's faith healing, reiki, crystal healing, this or that shamanistic chanting, prayer, etc.
What unites these things is the fact that some people make it work. Some practitioners of these things are charlatans, as skeptics are quick to point out, but some do get CONSISTENT results. We're also quick to point out the placebo effect, or 'the power of belief' as I like to call it. Problem is some people get healed who don't believe in the stuff, or that it's going to work. Sort of a hopeless last ditch effort.
It doesn't matter where it comes from (a theme you'll find recurring in my philosophy), as long as the job is done. If I get cancer and I hear being stuck in a dryer for ten full drying cycles cures it, I'll be the first one in there.