Sendak clearly felt otherwise. His work was weird, and strange, and never preachy. In Wild Things, Max is nasty to his mom. Most authors would follow this with a boring lesson about respect or some other crap. Not Sendak. In his world, Max is rewarded with an amazing trip, where he's given his own boat, and crowned "King of All the Wild Things." But it comes with a price, and before long, he realizes that the only thing that truly matters is being to the one who loves him most.
I love reading his books to my kids. It isn't a chore, or something I do because the public service announcement tells me it will make us all a better family. I do it because Maurice Sendak wrote good books. A life of good art, and of stoking the fire of a kid's imagination. I'd say that's time well spent.