Psychologists are therapists. Just specifically trained.

Nah, there are psychologists who measure axon potentials in rats and stuff like that. Therapy is an area in clinical psychology, which is a subfield of psychology, but you can get a psychology degree without ever going near that subfield. You get to be Dr. Rat Maze or whatever. But who knows, you might end up training the next Algernon who then takes over the world.

Source: had a grad student housemate doing that type of research. He said when people heard he was studying psychology, they thought he was getting trained to be a marriage counselor. Nope, nothing of the sort.