I sounds like you don't value art as the purest form of human expression but you'll never be able to convince others to think like you with logic. For my part I think you fundamentally misunderstand the value of creativity but I know I won't change your mind either.
If it was really about the message, then why waste all the time with the rest of the novel? Describe the message in a sentence or two. You could read an entire library of books worth of messages in a few days.
But that wouldn't be helpful. It would've been memorable, because novels aren't just about the message.
