For one, social media companies are a different kind of entity in legal terms and have different legal responsibilities.

Because you know that what you see in NYT and NN voices mainly the opinion of their editor/journalists, while Twitter can give you the illusion that the opinions you see reaching consensus there, come from your peers.

These are journalistic organizations. Not tech companies selling ads. Sure, newspapers sell a ton of ads, but they tend to balance the news and the commercial sides way better and more delicate than your average SV tech corps.