Because mainstream media is controlled by a small group of individuals who own most of the corporations in the United States and around the world.So why would they let that kind of information be known globally or locally , even for that matter , trust your Local conspiracy Theorist over mainstream media any day of the week, 9 times out of 10, the person who's being called the conspiracy theory is most likely truly to tell in the truth because most conspiracies have turned out to be truth as proven by the release of declassified documents from. The United States government, right? There is your proof that conspiracy's more likely correct than mainstream media or anything owned by the small group of people who were controlling whatever people see and they get away with it because they're privately owned in businesses and they can produce and say whatever they want on their own thing, because they have the freedom. Of speech to do so just like we do. But if you want the truth from the news well, you're gonna have to hunt and research it just like with anything else.