how do you know "hallucinations" are not real? How do you know psilocybin is just hallucinations? Why do you assume that other altered states that contain "real" experiences would be similar to OBE's or NDE's?

Just some things to concider. I have had many OBE's throughout my life..I have lucid dreamed and had OBE like experiences for as long as I can remember occasionally..I have also had natural DMT like experiences in the middle of the night many times. They are nothing alike.

However they can overlap. I have left my body in high dose ayahuasca experiences and DMT experiences, and those experiences were far more profound than any OBE I have ever had. The only thing that came close was one lucid dream or OBE(not sure which) that I had where I flew into space and looked back at the earth and had some kind of psychospiritual awakening. This was, however hours after an ayahuasca experience while I was sleeping..

The thing about OBE's is often people have meaningless things to report. Like they fly up above the house and look back at their neighbour cutting the lawn or something..I mean, great but so what? What can you do with that? Other times people seem to have some more profound realization about the nature of life etc..and those ones philisophically seem to be more in line with a DMT or ayahuasca experience.

In reality the only way to know is to take DMT yourself.