Because that's what the common elements of thousands of NDE reports suggest.
No, it is not. There is no reason a soul has to be involved in NDE. Nobody who had zero brain activity has ever been revived and reported an NDE. All those people died. They died when the activity in their brain ceased. So you have a sample size of exactly zero.
All the people who you say are reporting NDEs had some brain activity and then lived. Current medical science is fully capable of explaining NDEs without inventing a new notion of a soul and shoving it into the material theories. And medical science says that people dream, they hallucinate, and that they have poor memories. All of this fully explains NDEs.
There are neuroscientists and doctors who don't think that these explanations are sufficient.
Name three. Name three neuroscientists and/or doctors who think that. Provide contact information for each.
Of course, plenty of scientists disagree on plenty of things. That still doesn't mean that a fully new theory of "souls" needs to be invented to resolve those disagreements. And even if it did, the scientists would then test it. They'd make predictions about it and then test them.
Can you suggest a repeatable, falsifiable test for the existence of souls - a test where, if souls exist, the result will confidently be positive and if none exist, the results will confidently be negative? If so, please lay out your planned test.
What is clear is that neurochemistry didn't predict NDEs, just suggested possible causes after the fact.
Well, that's kind of an ignorant thing to say. Modern humans have been on this planet for at least 200,000 years. The whole idea of the scientific method - falsifiable, repeatable tests - only dates back to the 1600s. The first experiments to determine that chemicals were the transmitters of information between cells were performed by Otto Loewi starting in 1921. For reference, that's 199,902 years after modern humans arose.
EVERYTHING scientists do is after the fact. It's close to 200,000 years after the fact.
Also, seeing a phenomenon and then testing a theory to explain it is exactly how science works. Then scientists can test other things predicted by that theory that haven't been observed yet.
Neuroscientists currently have a theory regarding NDEs that has nothing to do with souls. There's no new phenomenon that doesn't fit current medical and physical theories. There's no reason to run a test for a soul, even if anyone could devise such a thing.
Can you?
According to NDE reports, the person doesn't feel like being someone else during NDE but feels like being in a different state of mind with a different kind of perception. As if you removed a perceptual filter, or put on a different perceptual filter.
But we know certain drugs can do that. We know partial wakefulness during sleep paralysis can do that. And we know that lots of people who report NDEs had been given powerful drugs and (in cases of surgery) paralytics.
What remains to be explained? What does a "soul" add to our understanding of what we can observe?
As I clarified, it is apparent to the near-death experiencer.
It's apparent to me if I go outside and walk as far as I can, that the earth is flat. It's apparent to me that my phone hates me, especially when I try to use the camera. It was apparent to me when I was a child, that there were definitely monsters in my closet.
Plenty of things are apparent to an individual that aren't true. Appearance is just a signal that we should run falsifiable, repeatable tests to confirm or disprove our perceptions. That's what they did to determine the earth was round.
Amnesia under anesthesia means that formation of memories under anesthesia is impaired. That's what I mentioned as a possible reason why many survivors don't remember an NDE.
You're still starting with your conclusion. You're assuming a soul exists and then dismissing instances that don't line up with your conclusion.
I don't have enough data to conclude whether a soul exists.
Great. End thread. Get some proper data and we'll reconvene then.
I don't know whether the information is 'as good as I need it to be', but I note that there are thousands of reports with common elements.
Name three. Name three people from three different cultures who reported NDEs that have common elements. Provide the names and contact information and I'll interview them myself.
See, I think that all you have are nameless stories. I don't think they can be traced back to any particular person. It's always an unnamed nurse at a hospital who heard an unnamed patient say something. Can you provide any names of anyone who reported an NDE and who is still alive to be interviewed?
I don't think you can.