I am a fashion lover, so i am going to answer according to me. Fashion is important because it is a self representation. By self representation i mean how you dress reflect who you are and also it can help with the opinion people have on you. For instance if you are a lawyer and you like what you are doing and you are good at it, it is almost a certainty that you are going to wear very nice and expensive suits just to express yourself as a great lawyer and when you walking in a room well suited, people are more susceptible to think that you are a great lawyer that you are a champion a winner. This a brief insight on why fashion is important, if you think this is shallow then you are not aware of anything in your environment. More ideas are in stuck!!!