You place a lot of trust in doctors. Knee arthroscopy is a good example where doctors knew for a fact that they were helping patients until we ran trials using

You place a lot of trust in doctors. Knee arthroscopy is a good example where doctors knew for a fact that they were helping patients until we ran trials using sham surgery and we found out it doesn't help some patients at all. https://www.painscience.com/biblio/fascinating-landmark-study-of-placebo-surgery-for-knee-osteoarthritis.html https://www.painscience.com/biblio/fascinating-landmark-stud... https://doctorskeptic.blogspot.com/2012/08/placebo-surgery-4-knee-arthroscopy-in.html https://doctorskeptic.blogspot.com/2012/08/placebo-surgery-4... PBMs are probably bad, but we need some organisation to look at the evidence and say whether something works or not.