When the goal is to fix yourself, the only relevant sample size is yourself. And when the problem may be psychological, then placebo effect may fix it, because you believe you've fixed it.
You're making a dangerous connection here. Alternative medicine such as TMS helping reduce pain through the placebo effect does not suggest that the alternative medicine is effective. It just proves that the placebo effect is real.
Alternative medicine may help in instances where the placebo effect is all that is needed. Unfortunately, there is risk that people may use alternative medicine as a replacement for real medicine and cause themselves unnecessary harm.
PS: Only after a reigorious investigation should someone look into developing coping skills.
Of course. That's how Steve Jobs died.
The scientific method requires someone to check their hypothesis. If they ignore data, then they're not doing science.