OneIsEros said:
...if psychedelics disappeared tomorrow, if that meant your spiritual practice also disappeared, it would mean you were not really practicing.
This.
I think many people find it somewhat comforting to excuse their use of hallucinogenic substances, or drugs if you will, with some mantra of it being their spiritual practice. That may or may not be so, and I cannot possibly tell as the relationship between spirituality and psychedelics is a slippery slope - especially so when it is not always clear what one means by the term "spirituality" - but I consider the possibility that many fool themselves this way.
I know for sure that I have fooled myself this way, 10 years back when I did an awful lot of psychedelics. I figured it was the key to some deep spiritual practice, truth and way of living. It distanced me from other people that didn't indulge in such activities, it made me reluctant to do everyday real life activities because I would rather ponder psychedelic nonsense and get on tripping again, and it made me somewhat of an elitist. In short, whatever spiritual insight may have been in these experiences I didn't really act on it, and it became clear to me after some time that I just really liked getting absolutely loaded and experience the sensory circus psychedelics provided. Hence I considered them more and more to be a weird type of drugs, but drugs nevertheless, and that taking them was, by and large, just getting absolutely geschtonkenflapped with some tiny bits of repeated "spiritual" insight. It just became the same.
Upon ceasing I took inspiration from my use and started really reading about eastern spiritual traditions such as Tibetan Buddhism, Vipassana, Dzogchen etc, and I found that the most effective spiritual practice is indeed to cultivate an absolute clarity of everyday mind without the use of any drugs. Going to retreats. Staying in the woods. Connecting with people. Doing everyday stuff mindfully, minding your responsibilities and getting yourself properly educated.
So I think psychedelics can provide some inspiration, sure, but that they for the most part for most people really is just about "getting high", albeit in a very special way. And I also hold that many people start believing pretty nonsensical stuff after tripping a lot, loosing their critical sense and that instead of getting out into the world and really making a difference through education and other means they just keep getting high whilst thinking it is the best they can do.
EDIT: I should add that I do not touch upon potential therapeutic use of psychedelics, as this is a very different story. But for the record I believe that they are therapeutic under correct circumstances and in the hands of a professional.