Youth cultures that become catalysts are expressive. They are pushing what you can do. Whether that is making music, doing drugs, skateboarding or being gay. Because when you actively escape the norm you receive ownership of some new part of society that wasn't there before.
However, most modern youth cultures are defined largely by their lack of culture. They are instead about passively escaping society. The top comment on the first video in the article is literally literally "I have no friends and I’m sitting alone in my room laughing hysterically at this video". There is increasingly nothing to understand. It is an entire generation being marginalized. But you can of course argue that many people always were.
Addition: Another example would be the relative failure of things that would be expressive like the "maker movement", platforms like SoundCloud and E-sports.
However, most modern youth cultures are defined largely by their lack of culture. They are instead about passively escaping society. The top comment on the first video in the article is literally literally "I have no friends and I’m sitting alone in my room laughing hysterically at this video". There is increasingly nothing to understand. It is an entire generation being marginalized. But you can of course argue that many people always were.
Addition: Another example would be the relative failure of things that would be expressive like the "maker movement", platforms like SoundCloud and E-sports.