I think you misunderstand what journalists do. Journalists are not supposed to be experts in the subjects they cover. They are not telling you the story based on their personal knowledge or beliefs — those are opinion pieces.
Journalists are expected to source information from experts and from people who are in positions to know, and to attribute the information they publish to their sources.
I am not saying that every journalist or publication does a good job of seeking the truth. Only that the job of a reporter does not require being an expert at anything other than - hopefully - information gathering and reporting.