Since next to nothing is known about the human body- it's as good a theory as any other. Doctors are glorified butchers when it comes to the brain. Sure- they can cut out a tumor, but big whoop. Recreate a brain in the lab. The fastest super computer is a toy compared to a single nerve cell.
Since next to nothing is known about the human body- it's as good a theory as any other.
No, it's not as good a theory as any other. There is zero evidence for it...zero. The more reasonable theory, based on what we know of brain anatomy and function, is that the brain is a self-contained organ of the human body, going about its work of keeping the body alive in a myriad of ways.