I don't know what to believe anymore

I don't know what to believe anymore I don't know the answer to this question. And I know all of you also don't know the answer. But right now I really don't know the answer. I am in stutter therapy now and the person I am talking to doesn't believe any person who stutters is able to be cured. She thinks that people who stuttered and are "cured" are just really good at masking it or avoid their stutters. But now we have to talk about my dad. I inherited my stutter from him and my aunt (his sister) also stutters. So it might be something genetic. I told him what my therapist told me and he told me he is indeed cured. He doesn't stutter any more not even a little bit. He said it was all about breathing and that he had a job at the radio. I don't know what to believe anymore. I want to think my stutter therapist is right about it not being possible my dad was cured of his stutter. But my dad is the living example it is possible and I always had hope my stutter would also dissapear like his. I really want your guys opinion on what to do. Should I continue my stutter therapy where to goal is to just accept I stutter. Or should I look for a place where they can help me with my breathing? (I am 24 years old btw. And my stutter isn't that severe but sometimes I am just not able to pronounce words. Depending on the situation ofcourse.)