Sometimes stuttering that becomes apparent as a child can cure itself. And speech therapy has been proven to significantly improve fluency in young children who stutter. But most people who stutter for a long time or are treated after puberty only make a partial recovery and some do not improve despite therapy.
It is this individual variability that frustrates many who stutter.
So why even discuss therapy? Because if you can lesson the psychological effects that stuttering has had on your life, that alone can help you accept your disfluency and not let it get in the way of your goals. For some people, the main goal is to lessen the amount of disfluency and/or the secondary symptoms of stuttering. It is important to mention that working through how we feel about our disorder increases the chances for success in therapy.
 Guitar, Stuttering: An Integrated Approach to Its Nature and Treatment.