My original comment is pointing out the title is stupid and uninformative.
I can't downvote, so I'm not one of those who anger you so much, but allegory is most likely being downvoted for presenting anecdotes as conclusive evidence and dismissively referring to anyone who disagrees with him as having opinions lacking experience.
If we're dressing up anecdote as evidence then I have plenty of my own, but I'm well aware of how useless they are at informing debate.
It didn't come across that way, which is more likely why you were downvoted. I read it as a snide remark equating psilocybin to heroin and didn't understand what you meant until you explained it. Make your comment less ambiguous next time and you won't get downvotes.
There's some irony to the fact that his anecdotes are about a nurse, who is someone who probably administers opiates as part of a pain treatment therapy.
It's being administered once as part of an intensive CBT program. MAPS et al have done studies that have shown psilocybin and other hallucinogenic substances can accelerate change in people's thought processes. Addiction is one of many possible uses for these substances, administered in a controlled environment under medical supervision and guidance.