I found that these comments or boundary settings sort of assume that the therapist is a complete dumb-a... I can't see a reason why anyone would find it helpful to see a therapist to whom one needs to say things like that. I found the suggestions to role-play therapy session with a trusted friend especially ridiculous. Honestly, what would justify the need to role-play for therapy session?
Don't get me wrong, I'm all for boundaries but that shouldn't be used as a justification for continuing to see useless therapists.