It's important to note that neither Peterson or Littman are psychiatrists.

Littman is a physician, but last I remember, she studied behavioral health and psychotherapy. Which is interesting because most doctors who have a significant interest in a field like she claims to have would have shut up a long time ago and pursued it through significant research after a couple of Ph D.s worth of work. But that doesn't make you wealthy, it just means that the one tiny thing you researched is right. She clearly would rather have money.

Peterson is just a grifting asshole with a psychology degree. Marketing is one of the most common employers of psychologists and he just does it for his own stuff.