This could also be why some people overcome their stuttering as they get older, because they’re more experienced than the other people in their life (or they’ve developed a greater sense of confidence from their life experiences). I think it’s a bit of a conscious choice we have to make again and again until we train ourselves to think properly, that we are worthy and we don’t need to feel inferior or live under anyone else’s shadow. I’m not sure why I was ever predisposed to think about myself that way, but getting past that was a huge stride forward for me.