In isolation, it’s tempting to think you have it all figured out. That’s right, you’ve got the answers, the philosophy, the explanations, and even the tidy rationalizations to sweep away points of confusion. It’s all quite comfortable. Knowledge of confirmation bias provides nonexistent inoculation against this pathology.
You never have to be isolated, of course – there’s infinite information out there just begging for consumption. But the tricky stuff is not easily changed through dissenting voices and long hours in the library, because the tricky stuff is not a matter of facts per se. Rather, the tricky stuff is another way of saying “life philosophy” which is another way of saying the stuff you really, really want to get right but to which objective answers are fleeting.
And so, you sort through aphorisms and religions (and a whole lot in between) searching for what feels right. Toss in your experiences and the hard-won lessons of youth, and the tricky stuff may not feel that tricky anymore. It’s at this juncture where people trend toward being stuck in their ways, an isolation where new information is easily dismissed.