It's a good question. There are a lot of ways that "psilocybin therapy" is more similar to behavioural/experiential (rehab, Camino del Santiago pilgrimage, etc

It's a good question. There are a lot of ways that "psilocybin therapy" is more similar to behavioural/experiential (rehab, Camino del Santiago pilgrimage, etc.) than pharma therapy. I'm not sure that those things are an appropriate control. But yes, there's been very little serious research. It was near impossible to do until just recently. Some more solid old research on iboga and some new, somewhat more mature research happening with mdma.