The problem with Meta is the monetization and engagement model, not the lack of fact checking.
Personally - I think that this was the moment when silicon valley billionaires without shadow of a doubt understood that they have power what used to be reserved only for state actors. Bonus - for using that power they get fined penny on the dollar at most or just slap on the wrist.
Update: now situation is even worse - states actively buy propaganda with social media companies, making those companies even more rich and influential.