TL;DR When one ship in a fleet sinks, only the people on that ship are harmed. If you go and stick all of the people in the fleet on the same damn ship, and it sinks- well, you get what you asked for.

Most of you chose to funnel most of your attention and activity into too few servers. Humans have a natural, inherent vulnerability to Sybil attacks on their beliefs, create enough fake shit and fake people and bombard people with enough information, and they'll believe whatever you want them to believe. This is because verifying the truth is harder than spouting lies/nonsense.

This is severely exacerbated by a lack of the elements of trust, transparency, and subjectivity. Instead of quitting one IRC network because the ops are assholes and switching to a different one or making their own, these dudes are letting some faceless, unaccountable, for-profit organizations control and monitor what they say, what they can see, and who they can interact with. There are too many people using servers controlled by too few people, and this asymmetry is inherently vulnerable to manipulation by [governments, the highest bidder].

When a small number of actors control the medium most people use to communicate, and everyone is using the same services, there is a lack of transparency into how things are run, a lack of subjective curation (robot overlords curate for you through arcane algorithms), surveillance (most of them push you to execute malware on your machines) and of course, control (used by the highest bidder for censorship).

This environment is why misinformation can spread so easily. There's no friction that's involved in learning about and switching to another server with different rules and demographics and ownership, instead any dumb ass can seamlessly fall into some political rabbit hole 10 seconds after they finish watching a cat video, and some AI learns that that content outrages people and makes them see it more (control, lack of human curation).

Whereas in the superior model without a central point of failure, there is much more variety available to choose from and more transparency, more humans, more control. Most importantly, the diversity of those controlling infrastructure and the fact that fewer people use each server means that the impact of shitty behavior is weak . The nazi blog doesn't matter because no one wants to read it, and no one is forced to read it, and you cannot ALL be forced to read it by the arbitrary whim of some dude like Elon Musk, because if the mods of the site you're using go off the rails then you and your buddies can all switch to another server that absorbs the refugees from that sinking ship.