I feel that there's some kind of feedback loop within the mechanism of brain activity. In order to make "better decisions" and be accountable for them, one has to be able to evaluate the thoughts that come into the mind to make a "better choice". I dont believe this to be control but only that it influences future thoughts and evaluations, still leading to the only outcome there could be, but an outcome of greater value if the "better" evaluation is made. As the professor said, "the unconscious brain activity is in harmony with your beliefs and desires", which being merely evaluations, implies that rather than one being able to control outcomes, ones past experience and evaluations will influence unconscious choices made in the present.