These things are not really present, unless you do a lot of generalizing, squinting your eyes, and wishing. Besides which the ancient Egyptians influenced many of our shared tropes. There's that whole bit with weighing the heart while a monster (the Eater of the Dead) sits and watches. The Sumerians have a lot to answer for, too. You may now point to Amazonian tribes, but why shouldn't our tropes go all the way back to a shared past in Africa? Not to mention the convergent evolution of obvious ideas. South America (Maya? I forget) had flood myths of its own, and a world tree.

Yeah, look at https://en.wikipedia.org/wiki/List_of_flood_myths . This does not mean that at some point there was a global flood brought about by a deity in retribution. It just means people throughout time knew the same stories or invented the same stories, and often thought about deities and floods. Similarly with your afterlife tropes. Memes are the freaky thing here.

Where is the pressing need to help repair space itself that Ayer reports as such a big part of his own experience? And where in Ayer's experience is this life review, reincarnation, or message of peace?

Where is that story from? Is George Lennox even a real person?