I think for some, it is important to know you can say things that are not particularly nice and still have everyone live. If one needs to get hateful or hurtful things out of their system, the therapist appointment is the best place for it in my opinion. Now one might want to eventually learn other ways of dealing with it. But for some I think it is vital to know that saying even truly awful things, will not destroy the therapist. And that the therapist can respond/disagree without retaliating or destroying the client.