Artists communicate their subjective experience, while science tries to be as objective as possible. This is why psychoanalysis has therapeutic value. Objectively, it is very effective at treating some disorders and maximizing happiness, as those results can be empirically measured. At the same time, therapists can adjust their practice to minimize known dangers with the theories. Some of Freud's ideas can give people the language to express themselves and heal, even if it's not totally accurate. Improving mental health is the important metric.