I agree: one's goal has to be to create a fulfilling life (whatever that means to one) with the nervous system you actually have. Wishing things away rarely works with mental/emotional realities. There's many ways to manage the reality of your specific self; e.g., I'm pretty anxious, so I start every day I can with a nice relaxing bath, during which I am free of anxiety. However, I don't try to make myself be free of anxiety when I have to speak up in some tense situation; then I use mindfulness techniques to just be aware and persist despite it all. Sometimes I do things to change my internal self, sometimes I just treat it like a person that needs certain random things to be at top performance. It depends.