There are tons of people who stuttered in childhood and grew out of it. That doesn't mean he didn't anything in particular for it. Even if he did, that doesn't mean it will apply to other people. His comments in this episode are very damaging because not only are they completely incorrect regarding stuttering, but they perpetuate harmful stigma and that stigma is one of the biggest factors in making stuttering so difficult. https://www.friendswhostutter.org/response-to-steve-harveys-commentary-about-stuttering-press-release/