In China information censorship is due to the government trying to promote peace and harmony. Aka, the government thinks it knows what’s best for people and forces it on people.
Facebook et al also encounter these same problems, where they see people spreading “misinformation.” It’s a hard problem to solve, but they essentially resort to taking the same types of censorship as China that everyone so easily criticizes.
The irony is Google is now doing it too after claiming to have left the market due to forced censorship.
Some people may cite China’s censorship/banning of Falun Gong. What people don’t bother to look into is that Falun Gong is an anti-gay, really out there cult. Their censorship justifications of that is not unlike censoring “fake news” like this “doctor.” While it may be right (of course their methodology may be questionable), it completely short circuits the ability for critical thinkers to actually analyze all content. It’s done supposedly for the greater good.