It is both good and bad that we don't seem to have more data on near death experiences. I mean actual research on mental impact and so on. I see some articles but the ones I found are relatively old.
Anecdotally, I had 3 NDEs and as the adage goes in the immortal words of Dr.House nearly dying changes everything for about three weeks. And it sounds about right in retrospect. I returned to normality fast. It sobered me enough to survive, but not enough to redefine my whole world around me in terms of domestication.
I don't want to assume, but I think you are extrapolating to a society from a single encounter. It would seem you over-corrected.
Just to further complicate this discussion, as an atheist, I do not yelp 'sweet entropy'. But it goes back to my original point. Things are complicated and you are making them more complicated by pretending they are simple:P