You have only presented rhetorical opinions but have not met your burden of proof. Science has proved that NDE is a hallucination? How so?

Scientific attempts to subdivide and explain the individual elements of what is clearly a complex syndrome of related phenomena indicate that scientists are resigned to the fact that their efforts to date at developing a more comprehensive explanation have largely failed. They seem to be reduced to explaining a complex system by examining a small portion of the data available and filtering out or ignoring the rest. Such an approach is not promising but it seems to have been accepted as the only research methodology available to them.

Science is a way of interpreting the results of an experiment, such as the one carried out by Thonnard, et al:

Since reports of NDEs are proposed to be imagined events, and since memories of imagined events have, on average, fewer phenomenological characteristics than real events memories, we here compared phenomenological characteristics of NDEs reports with memories of imagined and real events. Results showed that, in NDE memories group, NDE memories have more characteristics than memories of imagined and real events (p<0.02).

I provided evidence that these memories are at least as real as valid memories. Where is the evidence that these memories are all hallucinations? Oh, by the way, "We cannot assume from the fact that electrical stimulation of the brain can induce OBE-like illusions that all OBEs are therefore illusions"!

An NDE is not "anything goes" or "make believe"; actually, NDE memories are "at least as real" as valid memories.
Because NDEs have many common core elements, this suggests that they are spiritual voyages outside of the body.