In my experience it's been self-evident that individuals by themselves typically exhibit more common sense than some of the things society as a whole accepts as true and reasonable. I think that's the point.
What I've noticed over the years is that often an individual will believe or accept something that is widely believed without ever really thinking about it...some current "thing"...go along to get along. But when questioned and made to actually think about it they tend to suddenly see it differently...but not always.
The group mind tends to be less than the sum of its parts, imo.
How did H. sapiens prevail?
They were slow and weak, didn't have big claws or big teeth, couldn't climb or burrow or fly, weren't venomous, nothing like that. They weren't special in any way.
Except for two things: permanently attached manual manipulators on articulated stalks, and high speed/large capacity CPUs.
And they quickly learned to work in groups.
A single human on its own was a merely a squirmy, tasty snack; a pack of them could dispatch the largest and fiercest land animals on Earth and eat them.
How, exactly, did that work? How did the pack operate to be so effective?
Through ruthlessness, deception, treachery, deceit, greed, acquisitiveness, brutality, ruthlessness, vindictiveness, aggression, ambition, selfishness, organization, manipulation, and so on.
Since day one, and every day for millions of years thereafter, those behaviors were the ones that Mother Nature rewarded. (The Second Law of Thermodynamics is not sentimental.)
What was NOT rewarded was getting kicked out of the group. That meant effectively instantaneous death.
Result? People agree with their tribe as a reflex. They don't consider options and they don't try to change minds. They simply Go With What The Group Says.
The fact that recently (in historical terms) assorted inventions and tools converged in combinatorial ways that caused layered, complex societies with vast, sophisticated infrastructures to spring into existence---and that behavioral trait was no longer necessary to survive---means nothing. The tribal urge is part of human DNA. It is hardwired.