Substitute “plausible” for “correct” if you want to give them the benefit of the doubt. Either way it all so speculative as to be basically pure fiction. It reads very similar to me to various “scientific” defenses of particular religious traditions.

Again, as I said, I don’t think there’s anything inherently wrong with this. Little communities of people should do whatever harmless hobby is fun for them.

I just don’t find it very interesting or insightful.

If people want to spend time and attention and resources on existential risks, how about the ones which are clear and imminent, like wealth inequality, the retreat of world democracy and increasing power of entirely unaccountable and amoral multinational corporations, or global climate change, e.g. http://www.esquire.com/news-politics/a36228/ballad-of-the-sa...