So, it shouldn't have been written? I think some reminding is in order.
You said it, not me.
It isn't that hard to come up with a defense of scholarship and academic criticism against Robin Williams's movie. When a professor does so at great length, though, he runs the risk of becoming everything the movie attacks. I didn't like the movie, and I've always hated Robin Williams, but the article made me think a little better of the film (though not of Robin Williams).
Williams is sort of a Sixties guy. We can rage against the Sixties and the changes they brought and the leftover Sixties people, but over the years some of that spirit has become a part of us. We can cringe at literary fandom or the popular teacher who builds a cult around himself, but the dryasdust professor who's always publically taking offense at such things also wears out his welcome pretty quickly.