Whoa! Twis, I feel like you are comparing apples to chocolate bars to belugas. You're all over the place.

The fact that everything that is happening to the brain during near-death and out-of-body-experiences can be explained and replicated, is to say that we have an understanding of what is going on in the brain during these experiences, to such a degree that we can replicate the experience. It isn't a case of something artificial imitating something real, it is a case of something real being understood to a degree that we know how to make it happen. We can replicate heart attacks too, because we know exactly what is happening to the heart during a myocardial infarction. This doesn't mean "faking" a heart attack, this means we have the ability to force a real heart attack. At one point we may have thought a heart attack was any one of many gods striking someone dead, now we know better.

It is really fascinating, and is one of many remarkable and complex things about the human brain; but it is scientifically understood and most certainly not evidence of anything supernatural.