Silly art want to explore the space between the lines, some succeed, some fail. Not necessarily. Art is about identity, not issues.
Like chips or fries the story is best taken with a pinch of salt. There is a single set of rules for all artworks, imposed by the very unambiguous concept of objective truth. We could call this sloppy art, but we are humans after all.
Funny artworks do make one think and are not nearly as silly as they may look at a first glance. Contemporary art looking at whether its humor is an essential part of its identity.