I would argue that's not the case. The entire concept of "reality" is left to the individual in post-modern thought. I think eliminating the notion of authorship would be a solidly post-modern position to take.
> Postmodernism rejects the possibility of unmediated reality or objectively-rational knowledge, asserting that all interpretations are contingent on the perspective from which they are made;[5] claims to objective fact are dismissed as naive realism.