I know what you mean, but I now read "artistic nature" as making subjective/arbitrary decisions that for some unknown reason a lot of people favor.

Though by the way I read d0m's comment, it seems like there's a fair amount of objectivity in graphic design as well. Lots of logic: If you need to design something, it's because you have a goal and you need to make every decision in that design further take you to that goal. Gotta pick a color for something? Your goal means influencing people? What's your target audience? Pick a color that's statistically known to elicit the emotions in your target audience that lead you to your goal.