It could be argued that it was all inevitable given the development of the Internet: development of social media, the movement online of commerce and other activities that used to heavily involve "incidental" socialization, etc. And maybe it was. But "we" are still the ones who built it. So are "we" really the right ones to solve it, through the same old silicon valley playbook?
The usual thought process of trying to push local "community groups," hobby-based organizations etc is not bad, but I think it misses an important piece of the puzzle, which is that we've started a kind of death spiral, a positive feedback loop suppressing IRL interaction. People started to move online because it was easier, and more immediate than "IRL." But as more people, and a greater fraction of our social interaction moves online, "IRL" in turn becomes even more featureless. There are fewer community groups, fewer friends at the bar or the movies, fewer people open to spontaneous interaction. This, then, drives even more of culture online.
What use is trying to get "back out into the real world," when everyone else has left it too, while you were gone?