I don't think Randall Carlson is religious but I'm sure there are or have been plenty of religious nuts trying to use this stuff as "evidence" for the Noah's Ark story being real, for years.
Obviously, there was no flood that covered the entire earth, and Noah couldn't have possibly collected all the million+ species of animals when he was 600+ years old or whatever
[when you add up all the stupidity in that story it is really amusing that some people believe it as truth] But:
I have always thought that the myth could be loosely based on real events. If people of that time saw a huge flood wipe out their entire town; that would literally have been their whole world to them.
Keep in mind; if there's any truth to this in the first place; this event happened around 9,000 to 11,000 years prior to Christ's time. It seems unlikey an event such as this would be kept through time without major distortion. And EVERY event/idea/story etc since ancient times until recently was told with religious overtones.
Speaking of the bible, I want to read this book by John Micheal Allegro called "The Sacred Mushroom and the Cross". That guy worked on the first project that translated the dead sea scrolls (when they were found in the 1950s). This book talks about symbolism from that bible that dates back far earlier and has a lot to do with magic mushrooms. If you consider that it seems very possible, maybe likely, that the bible writers were doped up the bible starts making a lot more sense.
I've never done a psychedelic drug (I'm getting more desire to try lately honestly) but many accounts about them I read/hear have similarities;
you feel a presence/ entities around you or with you.
you hear voices
you see or witness beautiful objects or beings.
There's senses of astonishment, miraculousness, awe.
Sounds an awful lot like people whose "spirit went to heaven while the medics were reviving me" etc.
Then consider that people of 10,000 years ago were phenomenally dumber than we are now. We might take drugs and come off it with the impression "Chemicals in my brain do weird things." Back then they thought this was God talking to them.