[dmfdmf]

I agree. Also, some people groping with this idea will use the word "unconscious" when referring to the subconscious but the distinction is important. The subconscious is always doing something, processing info, etc., even when we sleep, i.e. it is an active process. We aren't necessarily conscious of it hence the prefix "sub" or below consciousness. Unconscious implies inactivity, inertness like a boxer knocked out in the ring.

>It is not generally helpful to think of this as a different person,

I think this is down right harmful and one of the psychological manifestations of the mind/body dichotomy. Disowning your subconscious is a path to neurotic behavior and unhappiness. It is "you" just automatized from your past and one of the most important tasks of the conscious mind is to monitor and correct automatized past errors through introspection.