Do I think these drugs are evil or that no one should use them? Of course not. They have incredible therapeutic potential and it's a travesty that they're illegal. On the other hand, I think a lot of people overstate their power (in terms of the ability to improve oneself) relative to alternatives. Do these drugs (LSD, MDMA, mushrooms, ayahuasca) have a place, for some people and in some circumstances? Absolutely. Should psychedelic therapies be researched and made available? Of course. Should anyone go to jail or be considered "evil" or "hedonistic" for the curiosity to try some psychedelics? Obviously, no. That said, I think a lot of "geeks" tend to overstate the benefits and downplay the dangers of recreational drug use, especially as a lifestyle. Timothy Leary was actually a mess toward the end of his life, and I've seen a few "psychonauts" crack up.
There may be benefits of long-term recreational drug use that I'm wholly ignorant of, having never gone down that road and having no intention to do so, but what I've seen around me recommends against that pattern. I prefer meditation because, although it requires more time and patience, it scales better: you get accelerating positive returns, and safely as well.