It would probably be a good thing if people could internalize just how utterly full of shit mankind is. People will push gigantic, intricate, sometimes logically internally consistent narratives, with supreme confidence and arrogance, for reasons that have absolutely nothing to do with truth or falsehood, likelihood, or true explanatory power. Most of the time, it's tied into instincts around politics and tribal cohesion.
(That goes for the muh-science types too. The shitshow surrounding COVID is a prime example.)
Look at the Russia/Ukraine threads. At most one of those worldviews is anything close to accurate.
I tend to distrust organized anything. The organization often exists for purposes that have nothing to do with the stated purposes. Skepticism, to me, doesn't mean that there is no truth (far from it), or that mankind doesn't know things that are true (also far from it), but that you have to strain the true things out of the inevitable bullshit.
Is "extreme" rationality actually irrational?
I can sort of see this sometimes. There is a group on the internet that calls themselves "the Rationalists", and as far as I can tell, they're possibly a cult. Certainly a California flavor of nutty. The sales pitch is that they're training themselves to think more clearly and suppress cognitive biases, but all the in/group out/group psychological games are in play, and they also seem to have drunk the Singularitan koolaid.
Maybe some of it is an attempt at self-correction. It often goes horribly wrong though - Scientology snares people with a similar pitch. "Your mind is broken and untrustworthy. Trust us! WE can fix you."
(Mankinds brains *are* broken and untrustworthy in certain ways. But there is no one that is going to help you fix it but yourself. Outside offers of "help" are the thing that the defense mechanism of well-calibrated skepticism helps you defend yourself against.
It's a defense against becoming infected with ideological mind-viruses, which we are prone to.
Just because it's a 'defense mechanism', in psychology-speak, doesn't mean there's nothing real to defend against. Your immune system is also a 'defense-mechanism'.)