People have been using these drugs for a very long time. Their affects are fairly well known.
Opioids are addictive, mushrooms are not. That singular fact makes them very very different.
I understand that we are not talking about the same specific mechanism (addiction), but I also want to keep my eyes open and not blindly stumble into the same broader category of problem all over again.
[0] https://wikipedia.org/wiki/Psilocybe_aztecorum
[1] Look under History and look for Avicenna https://wikipedia.org/wiki/Opioid
A key caveat is "ceremonial." Was it available at the Nahua corner store?