Primates have evolved a particular tendency to cheat. We look at others and how they're feeling, and we unconsciously guesstimate that this has to do with their value in the group.
This is quite literally imprecise, inaccurate, and unfair, yet like many biases, fallacies, and prejudices, it's a shortcut that can work some of the time. That it can sometimes work is used, when it's questioned, to justify all the times it doesn't. The usual term for this kind of response is "rationalization."
One adaptation to this unconscious, apparently evolved bias is to tell everyone that they should be confident. If they aren't confident, we say, then they will be mistreated. If they are confident, they will much more often get what they want in society and life.
And so most people adopt this confidence ethic and do what it takes to seem and feel confident. Even if they're reluctant at first, when they see how well it works, they're converts.
But it goes a step further. This isn't just helpful advice for getting by in an imperfect world. And the faults of the people who unfairly mistreat the unconfident aren't just brushed aside. No, it's worse.
See, because confidence is now an ethic, you are seen as shirking your psychosocial duties if you are not doing whatever it takes to seem and feel confident.
In other words, the rationalization for mistreating unconfident people just got worse. Now we're not only ignoring the unfairness of the primate cheat that looks to how a person feels to tell us their value in the world. We're also saying that if you don't respond to that unfairness by "working on yourself" until you are confident, then everything that happens to you as a result is your fault.
I'm not sure why this was obvious to me in 2nd grade when two or three of my classmates spent a while berating me for my lack of confidence as an explanation for why seemingly everyone in the class - including, frankly, them - seemed to dislike me.
It was obvious then, the cognitive mistake they and society were making.
And it's obvious now.
Why am I one of so few who can see this clearly, still?
Am I wrong, or are people rationalizing a bias en masse and blaming the wrong group for the problems it causes?
(Balancing refutation point: yes, research shows that insecurity can put up defense mechanisms and heighten biases. Meanwhile, limited confidence, or humility, or self-compassion reduces one's defensiveness and so increases the accuracy of certain kinds of perception, simply by helping with openness. And so there may, arguably, be a responsibility of some kind - adjusting, however, for mental health difficulties - to adopt this relatively objective frame of mind where possible. But it's an oversimplification to call modest confidence more objective across the board; every frame of mind will be good at some sorts of patterns. And in any case, to police others' mental states through social mores is dubious at best. We can give advice without judging those people who can't or won't follow it. The inside of everyone's mind should be as free as possible from external prohibition.)