Stuttering isn't an option. It's something that is a part of all of us. Just because you can work on and improve your stuttering doesn't mean he can lose it. I know stutterers who have achieved amazing progress through therapy, to the point where they don't really think about stuttering anymore. But they will always still identify as people who stutters. Just because you overcome doesn't mean can erase a part of yourself. Nor do you need to.