In the arts, this philosophy is expressed as “There is no accepted canon of Great Texts which must be honored, revered, and respected.”
A few years ago, I was internet friends with a post modernist composer. He revered the great composers and thought of himself as working within the classical tradition, but he also insisted that Bach and Katy Perry had equal merit.
I never got him to see the contradiction in this statement. More fundamentally, if everything is equal, why bother composing at all? Post modernism always involves a certain amount of intellectual dishonesty.
I feel like we should talk more. No idea how I missed your writing. You get it.