The problem is that the "conscious mind" takes exaggerated credit for a whole lot of stuff it barely intervenes to mediate and certainly doesn't micromanage (everything from picking up a cup of coffee to driving to work) and pretends away the huge workload of stuff it isn't involved in (visual processing, body language interpretation, language, etc).

When you strip out the conscious mind's delusions of command, it gets a lot harder to see what it's useful for. Hence the paper.