Seeing how "fake news" spread through social media, I have the complete opposite belief as you.
Also, news companies aren't immune to "fake news". The news industry have spread their fair share of "fake news". And their fake news causes wars and the suffering of millions of innocent people.
If you really cared about fake news, then you should be more worried about the news companies than social media. It's odd you are not. But I guess you trust a couple of highly biased editors tied to the establishment more than an open platform like HN. I frankly trust HN far more than the nytimes. HN isn't perfect, but you are far more likely to get the truth here than in the nytimes. Certainly the mods here do a better job of keeping things even-keeled and less biased.
The Weinstein story was researched heavily by reporters for (years?) and published by the New Yorker and the New York Times, for which they jointly won the Pulitzer Prize.
News outlets never had the ability to silence truth, just limit how easily it could spread. You could still self publish your truth or tell everyone you know, the same thing social media allows.
>If you really cared about fake news, then you should be more worried about the news companies than social media. It's odd you are not
Media companies are perfectly capable of using social media to spread their propaganda. It's likely easier, as it allows them to craft separate versions that appeal to different people.