First off, I want to thank you for having a civil discussion. This is a very charged topic, I know it's not easy. So thank you.
Okay, I must be missing something here, but your first sentence above seems to be in conflict with your 2nd sentence?
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More or less, what I'm advocating for is studies in which one group gets drugs and talk therapy and the other group gets only talk therapy. If I'm understanding you, you would agree to that approach?
No. What I'm telling you is that comparisons to psychotherapy are unecessary to assess whether GAC medical interventions work on their own merits. Secondly, what I'm telling you is that for practical purposes, most people who obtain medical interventions as a part of their GAC also obtain psychotherapy. The whole reason they are referred for medical treatment is because their clinician(s) recognize the likely benefits of said treatment over and above psychotherapy alone.