Everyone's so focused on confidence that they don't realize they should be going the other direction.
Get some facts? Keep your ears open. Question how you feel. Confidence is often totally irrelevant.
I don't say this because I dislike confidence, or believe it has no use, or resent people who are feeling confident. Listen, I often feel confident (and who doesn't love feeling that way?), and am often drawn to people's confidence (though that's not the only thing, and I can also be drawn to hesitation, etc). I'm just trying to correct a bias.
We have a bias *toward* confidence. Someone's got to be the annoying person pointing out that it's a bias.