There has to be a subconscious. Some people are so unaware of themselves that they're clearly not conscious of their own issues.
What are dreams if there is no subconscious? Why do schizophrenics have a hard time deciphering their subconscious world consciously from "the real world"?
That someone would even propose this actually strikes me as ESTJ. I would think an ESTJ would be most likely to claim this.
ENTJs have Ni, they must be aware of the subconscious at work, on some level.