Disclosure: I was in this study.
I do not view psilocybin as a substitute for alcohol. My relationship to the two is very different. Alcohol was a tool to numb and avoid pain and difficult emotions. Psilocybin became a tool for self-discovery, healing, gaining a different perspective and ultimately breaking a terrible habit. I have not had a single drink since my first session. It was life changing.
I am not suggesting this is without risks. Medicine is about potential benefits and potential risks. For me, this was one of the best experiences of my life.
This is a tool. It could have the potential to improve millions of lives. But of course there are risks associated with it.