An idiot, in the original sense of the word, is someone who focuses on themselves, showing no interest in the common cause/politics. It's a bit heavy, but reapp

An idiot, in the original sense of the word, is someone who focuses on themselves, showing no interest in the common cause/politics. It's a bit heavy, but reapplied here it could mean someone who focuses completely on visual quality, while not putting their time into other important aspects of the product (almost all of which are more important that visual quality, at least according to OP).