You are absolutely right, stuttering isn't a medical condition, But it could lead to other mental issues like depression, suicidal thought etc.. Having dealt with this myself, And I have tried speech therapy but It didn't work I believe this medication will change the life of 100 of thousand of people if not millions if it is proven to work And it's not wrong to hope for a medicine to try allievate the pain of stuttering , stuttering is hard, speech therapy can help that, but not for everyone