Comment by BoardsOfCanada

Because they aren't very similar in a lot of respects. If someone told you about their DMT/NDE experience you could determine which one it was with far greater than 90% accuracy. For example, in NDEs people express that they are outside of linear time, things happen in parallel (I can't imagine it but one person said they arrived at the bottom of a stair, and the moment he decided to climb it he was at the top, but could remember every single step on the way - that's the best explanation I have got of it) and in NDEs people meet relatives that tell them what is happening in a very pedagogic and honest way. In DMT trips there are foreign machine elves or other entities that accept you but don't really have that much connection to you. In NDEs you meet the light a lot and get flooded with love in a way you couldn't imagine before. So even though DMT have similarities to NDEs when compared to our normal reality, they are also not that similar. If anything DMT trips are more similar to UFO abductions than NDEs. It's just weirder than I can expect anyone to accept.