I'm not sure if I can really get behind the idea that "the author is dead" when it comes to authorial intent. I mean, let's say I write some particularly pithy essay or slick bit of poem or prose. You're functionally illiterate, but you like what I wrote since the shapes look pretty on the page.
Obviously, one can not say that you're wrong about the aesthetics of my work, but still...it's not like I wrote them down since I wanted to use up the last bit of ink in a pen before I threw it away; there's a level there that you're kind of missing, that I hoped folks would care about in the future. It's not so much incorrect to view my work in a different light than I intended (like say, how the funny shapes look), but I'd still say there's some validity to my original point.