The placebo effect is SCIENCE

[longship]

4. For pain and non-specific symptoms.

It does not cure bacterial or viral diseases. It does not cure genetic afflictions. It cannot cure cancer, or heart disease. It cannot rid you of your kidney stones. If your appendix becomes inflamed, a placebo will not heal it.

By definition, a placebo is a null treatment, one that does no more treatment than the intervention by the physician. That intervention itself has an effect on symptoms even though it cannot effect the underlying causes of the symptoms. Anybody claiming otherwise is likely marketing woo.

The Placebo effect is psychogenic, not physical.