Some would say the puke part is part of the cleansing, more spiritual than physical. Comparing shrooms to alcohol is very unfair. One is a spiritual plant, one is poison.
Pish. Once in a while, a drink is just the right elixer for a conversation or a mood change with a new friend. It doesn't deserve top billing, and the other drugs don't deserve to be so screwed, but it does have a deserved place in the human experience. Calling it mere 'poison' misses the mark for me.