I think what you actually mean is human consciousness. If not, let me know and we'll talk about conscience.
Just because all fathers are men doesn't mean all men are fathers. Likewise, just because all life is chemical reactions doesn't mean all chemical reactions are life. The complete consensual definition of life uses several advanced processes as criteria, for example metabolism, growth and reproduction.
Consciousness in the materialistic view goes beyond the chemical, because it's augmented by the bio-electrical. Thoughts literally zap around the brain when they're active. The rest of the time they're stored chemically in the brain cells. The rest of the body also uses small amounts of electricity (there's a reason we need to consume electrolytes), but it's doubly important to the brain.
The nature of the universe does not appear to be to create life wherever possible. Firstly, there are very few types of place in the universe where life is possible, so it's not easy. Secondly, since all known life shares genetic material and is therefore related, it appears that even here on Earth life only emerged once, and never again. I'm not saying we're the only life in the universe, but life seems so rare and unlikely to arise in any given place that the next occurrence of it is probably several galaxies away.
It does seem pointless to create a universe with nobody to experience it. It seems almost as pointless to create a universe and put nearly all of it completely out of reach of the observers, so our presence isn't exactly a masterstroke in the efficient use of the cosmos. It's exactly as if we are just here, and we can see what we can see simply because it's close.
Hope that lot is food for thought.
Do read my comments in the original question where I explain that there is very likely a difference between a brain which is dying, or almost dying, and one which is not. One might expect the experiences of the former to be somewhat unique, no?
Regardless of what a patient's religion is, if they're in the news we read then they're in a country where if the Christian concept of the afterlife, if not widely believed, is at least widely known. The reason why even non-Christians' experiences may feature Heaven and Hell (that's where you're going with this, right?) is most likely a simple unconscious association of these ideas with death. It doesn't denote belief, and it certainly doesn't speak to reality more than any dream does.
As for factual observations of things not visible or audible to the patient (which is getting into the more general field of out-of-body experiences), those are exactly the events which have not been verified. There are stories of course, but nothing that it's actually possible to pin down and say, "This happened."
Disagree with me? Then don't just wave your hand at the world and say the evidence is out there. That shows us nothing. Go find some concrete examples and link to them in a comment (use HTML links please, as in a href), so that we can do our own research and come to our own conclusions. Make an effort.
That's not just to Iens, it's to everybody. Show us what you've got.