When did we forgo > Life, Liberty and the pursuit of Happiness ? "Modern" mentality seems to be that everything is illegal unless government specifically approves. Any substance that emerges and becomes popular enough gets banned immediately (unless there's a huge backlash; I can only recall one case like that, kratom. Don't know much about that substance though). Meanwhile invasive questionable medical treatments an…
You should be able to take any chemicals you want as long as it doesn't harm anyone else. Even if certain drugs are potentially dangerous and they have associated risks, as a responsible well-informed adult you should have the freedom to decide.
Besides, humans do dangerous and risky things all the time! Bungee jumping, rock climbing, and sky-diving are some examples that immediately come to mind. In those situations even a small failure or mistake could easily end a life.
Legalizing it will actually make it safer, since anyone will be able to buy their drugs from a reputable store with strong quality guarantees. We've already seen this happen with marijuana.
Since we're on the topic, I also want to mention that there is ongoing work to legalize psilocybin in California. A few years back there was an initial attempt to get it on the ballot, but it failed to get enough signatures. Check out California Psilocybin Decriminalization & Research Initiative 2020 [0] if you're interested.