I think it hit the nail right on the head but in a rather biased way.
Sure DMT and other drugs like it are associated with delusion and psychosis.
A lot of shamanism is results based, not belief based and does not employ drugs, I think that point is absurd.
I have noticed that a minority of individuals, who tend to be very outspoken as well, do become extremely delusional and do develop messiah complex issues from drug use, because these people are so outspoken they give the impression that this is what DMT does commonly, however I have been party to dozens of people using DMT repeatedly and i can say that such delusions are rare and do not happen among most people i know. Not one person I know first hand who has taken DMT believes that it allows access to a higher dimension or to entities.
While such beliefs or delusions (whatever) are common online, in my experience psychedelics can be quite healthy and positive. A long term study of ayahuasca use in Brazil showed positive effects upon the mental health of the users in general. When long term studies of psychedelic uses show such things, we can assume that psychedelics are not good or bad, but are tools that can be used positively or negatively, just like a hammer or an axe.
In some individuals DMT and other drugs like it do promote the development of pre-existing psychosis, but these people tend to lack a certain type or rationality well before they ever take a psychedelic drug. In some cases a proper guided therapeutic psychedelic session actually helps people to realize their delusions and develop a more healthy outlook.
One issue is that DMT and other drugs affect how we perceive the separateness of self from the universe, not just in us, consider that mice on psychedelics react similarly and stop protecting themselves from predators. In many animals psychedelics induce behavior that is very dangerous to the animal taking them. At high doses with humans this is also the case, wandering into the street, not fearing things that one should etc. I know of many cases where someone took psychedelics and was injured or died by their behavior and poor (high) judgement.
I think that psychedelics in plants have the capacity to help protect the plant by endangering the animals that take them. We have taken these effects, such as the ones that break down barriers of self perception, as positive, but in other species this effect has the capacity to protect the plants/fungi from herbivores. One huge problem is that humans tend to be speciocentric and think that everything is all about and for them, that some master plan exists that centers round humans and was put together by (a) god. This is the real delusion that is the issue of the original post.
Psychedelics can evoke experiences that reinforce a persons ontology, if they have a teleological delusion then this will present more strongly. Sadly a lot of bad information, subjective experience based in teleological delusion, is found online and off and is informing peoples experiences in a potentially harmful way. Many people are taking drugs with the goal of experiences teleological perceptions, as opposed to exploring effects and consciousness. Thus there exists an approach that has the capacity to harm, in how people think of DMT well before they try it. This approach can have positive effects in terms of behavior though, deluded people can be very pleasant and nice people. I will take a nice delusional person over a rational asshole any day of the week.
Still, it bothers me how little objectivity people put into their consideration of psychedelic experiences. Then again, objectivity is not the nature of our species.
