There are millions of people who have died and at the last instant before death became irreversible, were revived and never had the "NDE".<quoted text> Point taken, but I think maybe you should have an NDE of your own, then maybe you would see things differently.
So I dunno how that could be an indicator of too much, when there is a small minority of people who say they've had one, compared to the majority that didn't experience the "NDE".
Death observes no prejudice as far as station in life, "good or bad", rich or poor, young or old, religious or nonreligious etc...
From everything I've read, the most common thread in the "NDE" is Cardiac failure and the resulting death/resuscitation.
For myself, that makes me think that it could have to do with a state produced within Cardiac failure, or the cocktail of drugs that are administered during those times, or a combination of all of those factors.