Actually maybe yes. A dent wouldn’t be considered cosmetic and the computer would get a new display or bottom piece. But scratches, maybe. I don’t know what Apple’s policy is with the aluminum computers but I do know that the polycarbonate notebooks might come with superficial scratches but not gouges.
In other words, for an OCD kinda person it might be best to purchase new. My brother is OCD and he hates the idea that somebody drove his new car a couple miles just to get it to the dealership. He bought two Hondas and picked them up right at the factory.