You are dealing with subjects like philosophy, logic, psychology, physics, religion, and what not. Something that claims to be everything is usually nothing; at best, such claims are superficial slogans, demagogy.

This argument would be true, unless there was a unifying element. There is. Holophany is special precisely because such a unifying element, an isomorphous lawfulness is the essence of the theory. This isomorphous lawfulness is a logical process wherein "existence" is inferred by the process. Or in other words, "being" (of anything that is) is a logical necessity. To see what I mean, read How is there Something from Nothing? and The Loop Logic. The full theory with its implications in psychology, science, etc. is given in my book, Holophany, the Loop of Creation.