I don't find it sad at all to judge on clothing and appearance. We are human, and it is hard wired into our brains to judge based on appearances first. Before you even consciously realize it, you make all sorts of associations and decisions about a person based on how they present themselves. That presentation is often fully within their control. You control how you weigh, and how you put yourself together. So to some degree it's perfectly okay to judge on looks and appearances. Now if you are judging people badly because they choose to not wear make-up, or don't have expensive clothes, or can't afford to look fashionable...yeah that's fucking stupid. You are not a bad person for not having expensive clothes, or even for choosing to not be dolled up. However your character can easily be called into question if you care so little about yourself that you can't look in the mirror, and make simple adjustments to look presentable in public. Wrangle your hair, make sure you face is washed, and try not to dress like you rolled out the depths of a trailer park or ghetto hell when you get dressed.