As with all tools it is only as useful as the user chooses it to be. If you know how to use that tool it works perfectly but if you are a ham fisted idiot it just creates more work. So you end up with groups exclusively posting critical messages in a 100 message an hour WhatsApp group or relying on an algorithm to post notices to all your users.
FWIW I think Facebook is a terrible alternative to forums, not least because they are in control of the content that can be posted. Yes, that’s in the T&Cs, but even legal activities fall foul of their censorship. That’s before you try to find an old thread or whatever (Reddit is probably a better fit and even that has its shonky aspects).
And yes to the echo Chambers, that’s definitely not healthy and has got us to a point where people are so intolerant of alternative views because they can’t deal with the idea that people don’t all think the same.
except you have a magic wand, which removes anybody you don’t like from the pub instantly and permanently, leaving only considerate, polite, friendly, helpful, interesting people
Except they haven’t been removed, they have simply become invisible and silent to you. And here’s the thing, some of them want to bum your dog, they talk about it quite openly but you’ll never know that until it comes running in howling from the garden.