> Compared with placebo, psilocybin enhanced post-intervention mindfulness and produced larger positive changes in psychosocial functioning at a 4-month follow-up, which were corroborated by external ratings, and associated with magnitude of acute self-dissolution experience.

It seems there was a measurable positive outcome after 4 months. It gets the desired result of enhancing human experience, so does it really matter whether there was chemical assistance? At this point it is just a drug that enhances mediation.