Not so much that - more that u put so much on ur plate (from exercise to work to meditation to reading etc) that u can realize it can be tamed better. Have u ever heard of Steve Harvey when he said ‘stuttering? No way.. I can’t worry to stutter if I have to do abcd in my life’ and it essentially cured him as u can see. He still stutters like fluent people but he has left the idea of it. Just how if u used to smoke and then quit forever it just isn’t in ur brain. Then if u see or smell smoke u can take a deep breath and ignore the urge for it. (I know it’s easier written then done but u can.. I promise.) The super super severe stutterers I’m not entirely sure.. but they can definitely improve/accept it for sure.