Sorry, I have to respectfully disagree with this example. However, I'll stipulate that positive thinking is rarely a disadvantage. I'm speaking of this example, specifically.

A person did something irresponsible and careless, at a friend's potential expense. Then, when the owner demonstrates understandable and acceptable annoyance, that friend (cleverly) avoided taking any responsibility by using magical thinking:

https://en.wikipedia.org/wiki/Magical_thinking

"Magical thinking is a term used in anthropology and psychology, denoting the fallacious attribution of causal relationships between actions and events"

This is oddly Machiavellian. If this was a regular pattern, I doubt this person would be a friend of mine for long.

"These two reactions towards the same situation created two different realities."

There is only one reality by definition. Perceptions can, however, differ.