"If people get better, we want to know if it's because [of] the drug we gave them, or is it spontaneous remission, or is it because of the doctor-patient interaction, or is it because of the ritual of taking pills?".
A great episode from the "Hidden Brain" podcast: https://www.npr.org/2019/04/29/718227789/all-the-worlds-a-stage-including-the-doctor-s-office