I've thought a bit about this issue and technology's potential role in fixing it. A generalized app that promises community isn't going to reach mass adoption outside of an extremely viral built-in mechanism. Mostly because the required user density is inevitably so high (also why most new dating apps fail). If you (or any other entrepreneur) is focused on tackling this issue, I'd do it incrementally, by fixing a clear problem in one very specific segment of your potential audience's life, and expanding from there.

Look at an website like https://www.lu.ma which is in some sense accomplishing a similar mission.