The said water, underground rivers supposedly discovered, were not as you state from what I gather.
"Have a read about what we know from the studies of planet earth some 4.5 thousand years back."
What many if not most don't seem to grasp, the said history writers, the history that they want you to follow, is NOT written by the good guys.
I have seen some of your symbolic stories, that step way outside of what the Bible could possibly have intended. In other words, there IS a boundary where one must stop, which the likes of Kam's faith, does not, they go way beyond, which means you can create as far as the mind choses. Throw in a good story with it, chomp, one has been taken in hook line and sinker.