I think you're making the error in thinking that acceptance as a therapy pathway of one's stutter leads to less investigation into the causes and treatment.  The real problem is that it's such a misunderstood issue as everybody stutters a little that its hard for a normal speaker to understand that it's a separate issue with the brain for a small number of people,  whereas compared to deafness, which nobody experiences, under normal circumstances, so is viewed as worse and gets more interest and attention along with other disabilities.  I think the general public for the most part just automatically thinks if a person stutters its a confidence issue.  There's no compassion for the issue the way there is for a deaf person, so by extension less interest to research. For stuttering, I think some future technology that interacts with the brain is the only hope to actually treat the issue.  In the meantime, more exposure and public understanding of the issue is needed. As for acceptance being a critical piece to therapy.. I don't think therapy works apart from people with a mild stutter.  All you have to solve inner turmoil right now is acceptance, which just means to ground yourself in reality. Thats just the ground level of things.  You then need to do the work on top of that and it can take years if not decades, and perhaps never for some, to be at peace with it.  Without acceptance, there would be elevated distress and turmoil.  It's most depressing and intolerable for many who I suspect are either young and/or comparing themselves to their peer groups and/or their stutter is moderate/severe that it has crippled their lives. (romantic, professional, etc.).    The only solution out of the suffering is through acceptance and then making logical steps that can be made after that towards some sort of resolve.   The ones who feel that journey to be too daunting and unfair are the suicidal ones unfortunately.  It's why acceptance is so important because it helps you build a compassionate relationship with yourself and to make your inner life healthier which you then can express outwardly and move on with things. Much respect to you. You're a great parent