Relativism is actually a misrepresentation of statistical data. It is only as real as one's consent to the concept itself. This consent comes with a dose of affirmation in that "there's another reality out there". During this mental process, one deconstructs their motivations on the "one, true reality" and now puts their mind to imagining a fake one that affirms them.

The concept of shifting realities is mental alchemy (a kabbalah notion). It is incorrect as it muddles up (over and over) the compartmental experiences or measurements as not a subset of the whole, but a whole in itself (which is flawed).