You may buy only clothes that you need and that's great but I'm almost sure that you know someone who buys dress for a one night out. Media and celebrities are always showing on the red carpet in new clothes and you never see them in the same clothes again. It is encourage to buy more and more clothes that very often are getting worn couple times and left in the closet forever. Some countries are better or worst at this. Here where I live, a walk-in closets are pretty rare, in USA they seems to be pretty much a standard. Why would you need a closet the size of a small room just to put there clothes of one or two people?