I don't think you quite understand how Stuttering works, i and many people have tried all of the things you mentioned and still have stuttering, it's very complex and not as easy as you mention to get around, not giving a fuck about stuttering is not possible, we have to give a fuck because it's reflecting ourselves and our personality, we can't hide or run away from it, we have to live with it everyday, we have to give a fuck in order to improve it and understand it on a deeper level which can bring some level of improvement and fluency