Why does every government story that's told has so many holes in it?

Every big story or detailed story they say is full of holes. One government official's account contradicts the other official's account or creates doubt. When several government officials are to speak on the same topic, holes start developing and then it becomes a mess. And then people start arguing with one another as to what is correct version and what's not. Some of the skeptics will be called conspiracy theorists while some will be even called traitors. So whose fault is it exactly?