Interesting take on the cause. Scientifically speaking it’s not so accurate of why we stutter. I am completely aware of my surroundings but my muscles just don’t want to comply. Your assumption could be onto something with that our neurological differences for whatever reason make the pathways unusable by overstimulation. For people who don’t stutter they possibly either have a differently wired brain and always have full power over these connections. I know based on a feeling in my head whether or not my stutter is going to be good or bad. I’m happy your view worked out for you though.