Some folks just need that element of conspiracy. It gives their life meaning.
The thought that the world is not really all that interesting is intolerable to them. They need to know there is a reason to what is happpening, that they alone have figured it out, and that no one else has because there is a monstrous cover-up by shadowy figures determined to hide the truth from us.
Oh yes, there is evil. And there are conspiracies. And there are cover-ups. But mostly there's just people stumbling along trying to make a buck.