Think of it like having a family member pass away. To tell somebody to accept the fact that their parent had recently died would be absurd. But it's not healthy or productive whatsoever to continue to dwell on it for a long period of time. Life goes on, and you are going to get left behind if you can't process and heal from it and eventually move on. And part of that is accepting it. Nobody is saying that you should just blindly snap your fingers and feel happy that you have trouble speaking. Just like grief, it is a process and it will take a very long time to reach that point (I am not yet totally there myself), but slowly and steadily things will get better. It's not your fault that you stutter. And it's not your fault that you feel this way. In fact it's totally understandable. What eventually does become your fault is not trying to better your life in one way or another. Whatever that may look like to you, nobody is going to do it for you. Only you can make peace with yourself.