> but it's just some sub-cultures, teens and troubled personalities that "express themselves" through fashion
Like, really?
My dad mostly wears tough leather boots, flannel shirts and aged jeans. It's all old, proven, and tough. He's a heavy outdoors enthusiast, into kayaking motorbiking and camping, and his clothing style fits this perfectly.
My brother is a big rugby player. He prefers a much more casual look, with rugby shirts, trainers, shorts if the weather allows, and a baseball cap (not often seen in rural England!).
We all express ourselves through clothing, whether you do so consciously or not. Even picking clothes that say "I don't care about fashion" is expressing yourself. We're social creates, and there's no getting away from that.