A lot of what passes as art is really an understanding of rules. Here I am using "art" loosely to mean anything from fashion to design to painting a picture. The more rules you know, the better you are as an artist.
Let me give you an example from design. Say you want to design a magazine cover about a hot new type of consumer gadget. One idea for the cover involves a picture of the gadget and nothing more. The other idea involves a picture of a person who happens to be using the gadget. Which one do you pick?
Answer: The person using the gadget.
One of the rules of magazine covers is that you want to include humans whenever possible. Humans are wired to be more interested in other humans than anything else.
My wife and I are in the process of building a home and choosing all the details that will be in it. One of the choices involves doors. If you start the process by imagining all the possible doors in the universe, the task is overwhelming. But eventually you can figure out the rules, and that narrows your decisions. For example, you want most of your doors to look the same, or at least be in the same general vein. That's a rule. And the closer any two doors are, the more similar you want them to be. That's a rule. And once you have made a decision on the general style of the home, the door choices narrow by about 90%.
In the course of my Dilbert career I've posed for literally hundreds of photo shoots. I like to observe the photographers and figure out their rules. I know they always want the lamp removed from my desk. I know they want my computer "cheated" in a way that is unnatural for the user but looks good in pictures. I know the window behind my desk is going to be a lighting problem. And I know which six-or-so positions they are going to ask me to pose in.
This all makes me wonder how far computers will advance in creating art and design. My guess is "farther than you think." The limit will be our human ability to realize when we are using rules versus something squishy like judgment or having a "good eye" for something. Once the rules are understood and programmed into computers, they should exceed our skills at everything from architecture to fashion design.