And apply medical trial standards. And everyone benefits, evem treatment isn't successful there are research results to work with.

Not charging would prevent treatments like the one in this article which would presumably be expensive. I think better that a doctor has to sign off a bit of paper saying they feel the treatment is reasonable. They'd be reluctant to do that for snake oil.

I strongly agree. The makers of the treatment recoup their investment once the treatment goes into prod. But while in beta, it should be free to the patient. Without this rule, I can imagine a world where businesses make a living selling treatments that are never intended to get past the FDA's certificatuon process.