John Harrison has written about this many years ago. If you haven’t read it I think you’d enjoy it as articulates some of what you’re getting at here https://www.stuttering-specialist.com/post/understanding-the-speech-block The only thing I would caution is what conclusion we make of this. Those underlying feelings of worthlessness, inferiority, and imposter syndrome many of us feel is not something we can choose to heal by force of will. There’s a reason that wound is there and while it’s important to try to heal it we have to be patient and also learn to accept it. We can’t force ourselves to believe something we don’t. I also believe that this isn’t something we can do ourselves. the issue is that we don’t trust people to be our full authentic vulnerable selves. So part of the healing has to come from an interpersonal level. We need to retrain our nervous system to trust people and that comes with feeling loved and accepted in our full authentic selves.