Short answer- yes. Im a person who stutters and have been studying the emotional/psychological aspects of stuttering since 2006. I’m also a psychotherapist. For many people stuttering is heavily rooted in psychological aspects and it can absolutely help. As a person who stutters and a therapist I love working with others who stutter on the psychological aspects and it isn’t something I’d be doing if this didn’t help me a great deal as well (I stopped stuttering fully for a few years in my 20s as a result of this type of therapy work - now at 40 I’ve gotten a bit lazy with it but if I were to really commit and lock in I could get myself back to that level)