As always, you pose a great question! On auto-pilot we still stutter, do you agree? So, we need to do at least something, to reach subconscious fluency or stuttering remission. If this is true, then, if we speak on auto-pilot - suggests that we are likely still subconsciously trying to control speech, react to speech errors, rely on 'rules' (high expectations), and we are still increasing the defensive mechanism. In contrast, in natural subconscious fluency the defensive mechanism is balanced 'our subconscious treats a low defensive mechanism as the status-quo'