This view is what creates egotism in art. It is also where the term "abstract" comes into play. It is abstract from the order we all live in. Meaning may be a term that is used in other fields, but the less an art world relates to the world we live in, the less meaningful it becomes. It may be that the work of art has a high degree of self-referential complexity, but its significance is unnecessary. This also is part of the dehumanization of art.
There are two worlds. One is the world we see and hear through our senses. The other is the legal world. Which is the real world?
Or, there are two worlds. One is the world of the inner, higher self. The other is the world of disconnected, random events around us. Which is the real world?
Or, there are two worlds. One is the world of thought, logic, and order, of attempted communication of meaning through language. The other is the world of feelings, emotions, reactions, communication through psychological responses. Which is the real world?
We could memorize baseball statistics and study cosmology and opera lyrics. Or we could play ball, go stargazing, and go see Les Mis. Which is art? Both?