The medias are completely money-minded as they would only publish the news that worth them more money whether the news is accurate and precise or not. However the medias are often interested in making news that may be extraordinary which may draw attentions of their viewers/readers.
For a lot of people, the issue is time. There's just too much going on just trying to make ends meet that there isn't any chance to do independent research and fact checking. i think thats why peoples believe in news.. I aslo believe in news.