Sorry, but this is just isn't true. I don't think you understand the depth of what's possible through dedicated spiritual practices. As my practice has deepened, I've become less and less interested in psychedelics, and certainly have no longer have any interest in them for spiritual exploration or growth. I would still use them for personal work, thinking of them as a supercharged therapy session, but even there I can see myself getting to a place where they're no longer valuable in that regard either.
Referring back to what
@terrapin said about lack of deep humility coming from people who use psychedelics as part of their practice, I wouldn't agree with that across the board, nor do I agree with all the other things he says about them, but I can see where he's coming from. Looking at the video
@TheMaster posted, its a guy who used psychedelics for many years, and has all sorts of theories and ideas about the ultimate nature of the metaphysics of reality, as well as ideas about exactly what the future holds. The experiences he describes aren't anything particularly novel, I've had plenty of similar ones as well. There's a story from Jack Kornfield, an American meditation master/teacher, about when he left his teacher Ajahn Chah to practice in a different tradition for a time. That tradition emphasized deep states of concentration, which usually result in all sorts of intense peak/mystical type experiences. When Jack came back to Ajahn Chah and told him about these mystical experiences, Ajahn smiled and said, just one more thing to let go of. The point of the story is that the peak experiences become less and less important as your practice deepens, what really matters is here and now. Taking those mystical experiences and trying to construct some vast meaning about them is just getting lost in more stories about how things are, rather than living in direct contact with reality at all times. Further, it implies that you know something that you don't - as I've progressed on the path what becomes more and more clear to me is just how little I know.
There is a saying in Zen that I think applies here, only don't know. This is something I see across traditions, that while different traditions describe it in different ways, at the core or root of all things is divine mystery. None of us know what will happen in the future, nor do any of us understand the ultimate nature of the divine - there are aspects we can attribute to its manifestations, but its ultimate nature is a mystery. Coming to accept this mystery allows one to be fully open in each moment to the divine that is always present, here and now. As you do this, psychedelics start to lose their appeal, as its clear that where they are taking you isn't in the direction towards the ultimate that is beyond any forms and always present.
I'm not saying any of this to shit on psychedelics or judge those who are using them, as I posted earlier I've used them hundreds of times and have a deep sense of gratitude towards them, and I'm sure I will use them again in the future. Each of us is on our own path, but having gone fairly deeply down both paths, I can see that there is something you can get from consistent, dedicated spiritual practices that you most likely won't ever find through psychedelics.