So true, usually, except in the case of emotionally caused stuttering. In my case, dealing with my abusive childhood through psychotherapy at the age of 70, fully ‘cured’ my stuttering. Because there are so many varied causes of stuttering both physical and emotional, using the word cure is usually inappropriate. There is promising new research into the use of medication to treat stuttering. If you're interested, go to Youtube ‘Dr. Gerald Maguire, MD. Also, Google him. Good luck with your fluency journey.