Authoritarians don't want people to be able to talk (and organize) in private. What better way to discourage them than some "think of the children" nonsense? That's how they attacked (repeatedly) encryption.
Google, Facebook, and Twitter all could have lobbied against this stuff and shut it down, hard. They didn't.
That speaks volumes, and my theory is that they feel shutting down these forums will push people onto their centralized platforms, increasing ad revenues - and the government is happy because it's much easier to find out all the things someone is discussing online.
It's honestly super weird. Now of course they are just proposing to tax the tech companies if they don't pay money to our local media orgs for something the tech companies neither want nor care about.