Part of this is the changes wrought by the Internet already. At one point, almost nobody got into fly fishing out of an idiopathic urge to capture little trouts.

I got into fishing because my neighbor liked to take his kids out and I came with. Then I ran into an old man on a lake who could do all sorts of wild casting techniques (through fly fishing) and who explained to me his scientific approach to catching fish. It sounded very interesting when he spoke about it.

The way of sharing information has been upgraded, but the way of forming communities has not. The people who want to catch trout are very well served by modern tools, but the people who wanted an occasion to talk to others in a quiet outdoor space are not.