Yeah but still - that is not a thing which actually happened. It is just systematic self-delusion, and an altogether pitiful approach. "I am not happy with the way things turned out so I will pretend they did in fact not turn out that way."
What is created is the knowledge that a different experience is possible. Not just textual knowledge, but lived knowledge. Examples of the correct behaviours that you may see in movies or read in books or even witness in your friends are still not your lived experiences. This approach changes it.
This being standard talk therapy and not what grandparent poster was talking about, so the approach he talks about doesn't sound pitiful. Your emotional system (which drives a lot of cognitive behavior) responds to things differently than your logical self.
Also your post seems pretty harsh and judgey for someone that hasn't tried what they've tried, and potentially hasn't had the same life experience.