Case in point:
> It's genetic - we're not designed to think rationally about tribal issues.
> like QAnon with its paedophile shtick - and it's a home run for the liars.
Why? Because the actual truth of these child trafficking rumours is unknown.
But it accentuates your point. There are exceptions here and there, but your initial point seems to be very true: generally speaking, people are literally unable to think logically about many things. And many additional things (that we do not yet understand) are surely layered on top to exacerbate the problem - one I've observed is that the mind seems to have an aversion to the unknown, which plausibly makes sense since the brain arguably evolved to optimize for fast decisions...at times, indecisiveness could be deadly, so a bias against it should be surprising. (Is there any truth to theories like this? Once again, it is largely unknown - at best we typically have a few (unreplicable) psychological studies that hint at it.)
Although, I think all is not lost - while individuals may not be able to do it independently, perhaps more structured crowd sourced approaches could help. I think by decomposing a story down into discrete assertions, each with an epistemic status of some kind (with attached evidence), could go a long way to improving public perception of reality. Whether such an approach is in the interests of powerful people seems questionable.
You may notice that the public discourse on important issues tends to take the form of a meme war (battle of mini-narratives repeated over and over), as opposed to a singular comprehensive document summarizing what is known, highlighting portions that are unknown or disputed (with competing arguments). Are meme wars how one would run a complex software project? Not me. But why do we run the planet this way? And why can nobody notice?
For some answers to that last question....some people have complex theories to explain why people can't seem to think straight, this one is a bit deep but quite interesting. My very rough take is that our perception of reality largely consists of or is shaped/defined by the ideology we have been raised in, and as a result we simply can't "see" objective reality itself.
Slavoj Žižek: The Sublime Object of Ideology
https://www.youtube.com/watch?v=TtIckkHsUQ4
https://www.goodreads.com/book/show/18912.The_Sublime_Object...