My objection is not about unconsciousness, nor is it about consciousness - it is about the division of the mind/brain into two systems.

I have a mind (product or function of my brain) and that mind does the things like perception, problem solving, motivation, action, memory, emotion and so on, all the mind-type things. Some of that activity I am aware of and some not. This is not a difference primarily in the activity but in which parts of it rise to consciousness. Nothing much happens in consciousness other than conscious awareness. It is one system. Consciousness seems to be necessary for some functions of memory and focus of attention, to predict the use of skeletal muscles, to facilitate some complex thought that requires a working memory (language and the like). I do not associate my 'I' with my consciousness alone but with my whole, single, undivided mind. That is how it feels and a division does not resonate with me.

I know that we were all brought up to accept a Freudian or some other such division inside our heads, but I was not able to believe that in the '50s when I was a teenager and I have never been able to do it since. I do not feel divided and never have.