If you choose a black teammate for your sports team, or an Asian person for your knowledge-bowl, these are reinforcing positive stereotypes that might be equally wrong as any negative stereotypes. Or maybe you choose a female therapist or physician assuming her feminine empathy and intuition will make her a better provider. Is that still wrong? Or are only negative stereotypes wrong? What if a person has had repeated bad experiences with a certain type of person? Is that a justified prejudice or should they expose themselves to more risks to be appropriately PC?