it seems an inevitable part of our evolution as a society for artistic expression to be categorized and industrialized for profit.
all of life is in essence an art. even the desire to dress down is a bold statement. just as you feel spite towards the fashion industry, a musician may reflect your sentiment to pop culture and what it means to be successful in today's music world.
i agree with your comment b
If clothing were standardized, we'd find new ways to distinguish between one another. Skin color, accent, teeth, hair, facial features, intelligence. The differentiating compulsion exists within man. It has to be destroyed there somehow. Each one has to do it for himself. There is no fixing the external world because it is projected out from each individual. The "world" is not separate from our individual desires and drives.

fashion will always be here. we're intelligent creatures that express simply by being alive. our beliefs, desires and personalities in all avenue/facets of life.