It's funny how well that works on hams (and other types of mental gymnastics stars) though. They literally both said the same thing, that Julie's diary didn't reflect the reality of how she eats irl. It's just one said it with a "here is your wake up call," raw, unfiltered way, while the Dr. used basic social psych/speaking methods and sprinkled in some definitely fake empathy in there for good measure.  He understood she was looking for a way out, he understood that she realized how totally rekt she just got by reality, and he gave her that way out so that in her head she's saving face. Everyone and their mother knows she lied about what she eats - the doc is just great at getting her to admit it and fix it without her obviously inflated sense of pride getting in the way