Novel Writing Capacity

I'm fascinated by how much money is being invested into AI to write novels and essays - billions and billions plus all the ongoing energy costs. The irony, of course, is: what is the total amount of money the globe spends on novels? Or essays? It's gotta be less than we're spending on the AI to write them. Someone explain this. 

The other thing - why would anyone need an AI novel? Are there people out there who've read every novel they want to and are like - come on, please hurry up, we need an infinite number more? Or is all this to write one great novel?