Hi, Twenty-two! What's up?
I couldn't agree more with you... Fashion is usually outrageous! If you see what's displayed on worldwide runways, you'll see people would never wear those pieces of clothe and accesories. Celebrities are paid for wearing specific clothes, and each one of these dresses cost a fortune!
But if we take a look at young people nowadays - for not going too far - I think I agree with you: peopple just wear trendy clothes that don't belong to their own identity. Odd clothes catch people's attention, which is what they really want to achieve, but I date to say that fashion rarely has a purpose in terms of identity or culture. Odd socks are not the exception. 
Why do you think they like wearing these clothes? How do you think they feel when wearing them?
Cheers!