This is what the deconstructionists were preparing us for, I guess. The author is dead, and if not dead, then fake. It was never a good idea to tie our sense of meaning to external validation.

The humanity immanent in the text came from you, the reader, not the author, and it has always been that way. Language never gave us access to the author's mind -- and to the extent that statement is wrong, it doesn't matter. AI is just another layer of text, coming between the reader and the same collective consciousness that a human author would presumably have drawn on. The artistic appreciation of that text is the sole privilege of the reader.