The thing is Walled Gardens Die by Pacifism

People come to these platforms to have a certain experience and get rid of opinions they don't like or generally content they don't like. That becomes a problem when your government is using it for communication though. I still think social media companies can be highly moderated curated platforms, but communications from news outlets and government agencies definitely need to be taking place on a federated network. Places where you are going to see opinions you don't like and consume content you don't care for because if you don't you don't get the chance to participate in the democratic process.