Should we do more comparisons to no treatment? (Placebo is not "no treatment", that's why we have placebo effect.) Three cohorts, medication, placebo medication

Should we do more comparisons to no treatment? (Placebo is not "no treatment", that's why we have placebo effect.) Three cohorts, medication, placebo medication, no treatment. There must have been studies like this? This metastudy seems to say they have no evidence of a placebo effect, though. https://pubmed.ncbi.nlm.nih.gov/12535498/ https://pubmed.ncbi.nlm.nih.gov/12535498/