I agree and disagree with your points. For the record, I am far from coming to any conclusions on the matter, and until there is any real evidence for it, speculation is all we have. I also feel it is wise not to get bogged down with superstition or woo woo.
What I disagree with is that you seem to think that horrific deaths were more common in the past, and yet we live in one of the most violent stages that humanity has experienced.
The last 100 years or so has been drenched with blood. The weaponry with which to totally obliterate the opponent has also become more sophisticated and ever more obliteraty. People are beheaded and stoned to death on a regular basis in some parts of the world. There is also wealth inequality on an unprecedented scale, leading to starvation, famine etc. Natural disasters are ramping up. Our modes of transport are fast, heavy and carry highly explosive fuel and can cause terrible accidents that wipe out scores of people in the blink of an eye. You get the picture.
Death is very much something that we need to come to terms with, and it has always been that way, it is the greatest unknown of all.
Now I feel that DMT has helped me psychologically with death. It isn't always a lovely melting union. Far from it, some of my experiences have been, for want of a better analogy, pretty damn obliteraty.You don't necessarily need to take it in a traumatic circumstance, it can easily conjure those up for you. I don't think DMT is the only psychedelic that can facilitate these types of experience. Shamanic cultures talk of dismemberment experiences, being torn limb from limb, or flesh rotting off bones, often in conjunction with a rebirth type scenario. What's with that? Is it purely symbolic? Is it a rehearsal?
These realms that we go to when smoking spice are bizarre, very intense and can be more defined than our day to day experience, our awareness can balloon to unimaginable proportions. That to me is a very intriguing and baffling thing.
The pineal thing is valid and certainly adds a layer of complexity to the issue.
And what of NDEs? Where do these experiences fit into all of this?