https://www.whatisepigenetics.com/scarred-for-life-the-epige...

https://pmc.ncbi.nlm.nih.gov/articles/PMC6414251/

I don't think we are biologically far enough removed from "Oh my god, run, bear/snake/lion!"

https://pmc.ncbi.nlm.nih.gov/articles/PMC1376114/

And we may not be built (biologically) for the level of comfort that the majority of us (more so here on hacker news) live in.

I think the doom and gloom serves a purpose for a lot of people.