> You are purposely forgetting that design relies heavily on taste.

Not only that, it ignores how culturally-dependent design is. Sometimes in really big, fundamental ways -- take, for example, the fact that in China, the color red is heavily associated with luck, joy, and happiness. A big part of design is understanding and incorporating these kinds of local knowledge; at the end of the day, design is a process, not a destination.

Much like art, it's impossible to truly separate design from the greater context of the world at large.