I understand what you mean, and also understand the nihilistic stance, however, the same way humans don't exist in a separate plane, the selfception and empathy toward others (which is not unique to us) allows a more than zero sum interpretation of art. Naturally the technical part can be reproduced by machines but the metaphysical part cannot. What becomes interesting is the notion that the metaphysical can be created post-hoc, which puts us squarely in the same situation as other poster wrote by quoting the passage of "The man in the high castle".