Psychedelic-Assisted Psychotherapy: A Paradigm Shift in Psychiatric Research and Development: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6041963/
Reviewing the Potential of Psychedelics for the Treatment of PTSD: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7311646/
etc.
Maybe they want to convince their friends?
It is still early days. If one can end depression with an oral medication that isn't scheduled one is better off.