It is the same as trying to understand and "know" something of a small dimension situated on the planet Mars, by looking at the sky with naked eyes. They go in mass hysteria and create these impression among themselves.
The DMT they ingest and the drugs they take are that of the trees or animals or sponges. So you tell me that a sponge is much more impressive to you than your perception of life as it is? If that's so then it is truly revealing. A rock is much more insightful than that of a low human. Simply. What's the amazement to experience those things?
It makes me laugh very hard, that a sea sponge is much more revealing to someone than their own existence. The sponge won. The chemical is that of a sponge. Even if it is the "same" molecule on a preview look, in reality it is not. Smelling toads ass and skin and thinking you talk to Gods afterwards is a joke of cosmic proportions.
What we contain within is of an extreme caliber. All of the drugs in the world, natural ones, are existent within us. The systems are there, the chemicals are born in us, no need for external ones for any perception, insight or anything of this sort.
For example, if you really advance and let yourself surrender into the abyss of the 7th chakra in meditation, you will find that the above experiences of people are not even close to a fraction of the real actual way of accessing higher perception and sight.
Not to mention that the basis of existence is based on control, which in drugs you don't have. Losing control on mental gymnastics of imaginations and mix of dross like doing drugs is a recipe to permanently lose your psychic. To die is less of matter when the above happens, simply as you reincarnate insane and lost the ability of judgement within this. Extremely stupid.
Another study I found recently, said that schizo people create within themselves a psychedelic chemical that is found in some things. Their own bodies produces a drug that sustains their illness, disorder. Everything is mirrored.
If you want to feel something of importance do advancement. If you want mind bending experiences, do meditation and advancement.
Did you know most people shit themselves after taking ayahuasca? It is a known positive step. So I have to shit myself to become illuminated. Amazing.