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This is a pretty good some up of the difference between things as they appear to be and things as they really are.
(hexbear.net)
I suspect a lot of people have difficulty recognizing that what they believe about the world may not be representative of how the world actually behaves. I certainly do, frequently.
Like with politics, people think they need to go vote and march and stuff to effect change, but if you're willing to accept the idea that there are limits to your ability to perceive the world and your perceptions are misleading, you can pretty reliably go and see that isn't true.
You can also decipher deeper realities like you can basically put whatever you want on flat bread, or that you dadskf;'akse'wfaegqrwt;'lj'a fuck my brain. I'm asd I'm not sure what I was trying to say.
The entire field of modern economics. So much of modern economics is articulated by people who live in Plato's Cave. They will write these papers trying to explain how "innate market forces" work, when the reason they work the way they do is because the law designed them to work that way, and people with guns will come to arrest or kill you if you attempt to alter that.