I really don’t agree with really anything you said about fear from my personal experience. Although it seems the onset of the habit of stuttering where the neural pathways were laid may have been due to increased stress and even fear. Once the pattern is laid it doesn’t seem to matter much. I use to stutter even when I wasn’t in fear because it was habituated to circumstances, words, sounds, people, etc. I do agree that trying to become fluent via force and discipline goes against fluency and may create even more tension and stuttering. I proven that time and time again when I would “get serious” about speaking with my technique at the time. It never worked for me. It only got would and I would spiral even harder emotionally.