Why would you break one of the "rules"? What is a particular circumstance in which you might break one of the "rules" in a photograph?

Lets say you want to create a dreamy photograph, you can break the rules by putting it out of focus. Another great example is by trying to create a dramatic photograph by trying to take a perfect photo with a straight road with fields on each side. break the rule of thirds and center the road, it'll create a dramatic photograph.