I don't really agree it's unfortunate. I think the "throw everyone into the same pot" has been an unfortunate side effect of the commercializing of communication. BBSes and forums were allowed to grow organically. They weren't for everyone, but anyone who wanted to be a good-faith participant in the conversation was generally welcomed, while baddies were moderated out by moderators who were actually empowered. Some would say over-empowered (there was plenty of drama about moderators having biases and what-not) but then communities could split without people necessarily feeling like they had just been excommunicated from a global forum like Facebook or Twitter.

In short, I think people are wired to do better in smaller groups and I welcome this balkanization, albeit with the caveat that the communities can interconnect and grow/shrink/die/emerge organically to suit the needs of the people within them instead of commercial investors.