Imposter syndrome is often presented as a personal failing. A lack of confidence, our wrong-headed beliefs not matching the reality of how competent we are, or worst of a flaw of our gender. Just tell yourself you are wrong! Imagine everyone else is just like you! Have confidence in all parts of yourself except that part that tells you not to have confidence!
Unsurprisingly, these interventions are not often effective. At best, they change behavior, frequently while making people who already feel bad about themselves feel worse. At worst, they lead people to stop trying to improve the environment they have found themselves in.
I would like to offer an alternative story: imposter syndrome is a rational response to insufficient feedback.