If you dont stutter when you are alone, you dont have this disability or at least its very low. Stuttering infront of others has psychological reasons that needs to be taken care of by psychiatrists not speech therapists. Ive seen speech therapists several times during my life and they only helped me understand what stutter is, nothing more, but as soon as I started seeing a psychiatrist for my social anxiety, everything started getting much better, I stutter MUCH less compared to a year ago. Speech therapy is recommended for sever stuttering due to some diseases or etc, and children who stutter.