This is an old post, but such a very interesting topic. What if all healing is self-healing? Many of us believe in the body's ability to heal itself, given the right conditions. The placebo effect, in my opinion, is deserving of a ton of scientific research, but it isn't going to get it, because who's going to profit from it?
For those who would like to dive a bit deeper into this topic, Dr. Joe Dispenza's book "You Are The Placebo" is an interesting read. Here's a link to his website, where you can read more about him and also his books, etc: https://drjoedispenza.com/
I have purchased his meditations and used them, and they felt powerful, but for some reason, they just didn't really resonate with me. I'll probably go back to them at a future time. I'm sure I have all kinds of subconscious beliefs about healing being 'hard'.
I think the placebo effect is such an interesting topic, and we just don't know enough about it to use it to advantage. If we could consciously harness it, healing would be a breeze.
I'd love to hear if anyone is pursuing this and has any references or suggestions.