[seanwilson]

> For most back pain, you can't even prove that person is actually suffering from it.

Why does this matter? You ask the patient to report on their subjective experience the same way you would in studies about cures for depression and headaches.

My point is that 1) only when no surefire scientifically backed cure exists will most people take alternative therapies seriously and 2) problems that can resolve on their own (self-limiting) are very susceptible to generating unreliable anecdotes about cures. Back pain fits these two so generates many unreliable anecdotes which you should be highly skeptical about.