That's not what our best current science about consciousness tell us. It tells us that consciousness is part of the process of what "the rest of the meat sack" does; that it's not possible to separate out a "witness" part that "journals" what the rest does. It's all one process.
The ability to make choices about actions based on some more adaptive criteria than the initial impulse itself.
What is a choice in this context? A thought about weighing the costs of possible choices relative to their outcomes.
What is lack of impulse control? Just a different thought, or the absence of the “right” thoughts.
What are the right thoughts? Thoughts that we’ve formed thoughts about and “assigned” a particular status (by thinking).
There is nothing metaphysical here and it all boils down to a really simple question: from where do thoughts arise?
Scientists have observed activity in the brain that is associated with decision making firing up to 10 seconds before the subject became consciously aware of the decision. At a minimum, this raises serious questions about the nature of the decisions we make, and is understandably uncomfortable to consider.