Freud got there via a different route (a much more arduous route) but at the end of the day, the Id/It, the Ego, and the Superego are just the Victorian nuclear family. The Id/It is the child -- just pure desire. The mom is the Ego (balancing the interests of the family between the child and the father). And the father is the Superego who makes the rules and is usually unnecessarily harsh. So psychoanalysis then is just the study of the family internalized (and the way that these three competing roles play out in our individual psyches).