Another major aspect of a healthy society is distrust. People trusting anything they see written down is a major issue for a healthy society. This was rarely discussed when everything that was written down was controlled by the large media conglomerates, but it is becoming a huge point of contention today. Traditional media are furious that they are losing their unique ability to shape publish discourse, and are desperately lashing (there was a NYT article outraged that some site was permitting the creation of private rooms with no control of what is being discussed).
I don't believe in censorship either but we need to find a way to disincentivise behaviors that lower trust.
You missed the root cause. The mainstream media lost the trust of the people with their biased reporting. This leads people to look for alternate resources, which are being manipulated like this.
I see your point but I don't necessarily agree. A major aspect of a healthy society is trust. We need to be able to trust most of the informations that are fed to us in order to get information. Navigating a trustless information landscape is incredibly time consuming as looking for sources and invalidating information is much more time consuming than producing it.
Requiring people to stop acting on their "outrage" feeling is also extraordinary damageing to society as it also stops people from reacting to actual issues.
Finally, if you look at the savvy people do you really believe that they are actually better at detecting fakes? It seems that they are better at identifying information sources that can be trusted, but once trust is established I'm pretty sure they don't spend all their cognitive resources trying to disprove everything they read (well some probably are).
So a bit like with malware being more abundant on more popular OS, even if everyone moved to reputable sources, the trolls would move as well.