So what, you ask? Here's what. Every one of those sources had a responsibility to do research into facts before reporting their findings. When your reporting is scrutinized by thousands or millions of people, it behooves you to get it right, so these providers of information go directly to the best sources available. If they are writing about a train wreck, they will talk to people who where there to gather first-hand evidence of what happened. They will talk with multiple such sources in order to corroborate information to make sure it is consistent. This type of research is painstaking and time-consuming, but the professionals we entrust to do it are paid to do the work.
What this meant is that we all gained our understanding of the world through the same lens of knowledge. We had fundamentally different views of how we should proceed then as we do today. I'm not talking about political or social philosophy here. I'm talking about the factual foundation upon which we build our beliefs.
Fast forward to the birth of social media and blog posts. Now, almost anyone on the planet can become a reporter of information. They have no professional guidelines. They have not professional training in reporting facts. They may not even have any interest in facts at all. Yet, their voices can be just as loud as that of network TV news (even louder when all then networks pick up their story and rebroadcast it).