Yeah and why do we have more than one news organization, when we could just have one official news channel and you’d never have to go searching for news articles again. And we could have one central bank that holds all of our money, that would make sending money around much easier.
I don’t think the importance of the information stored changes the fact that storing it all in one centralized place is generally a bad idea. The latter is a bad idea, the former is a bad idea but with worse consequences. A decentralized internet is a healthy internet.