Well, yeah, good faith journalists and news organisations are arbiters of truth, along with documentarians, historians, scientists, people widely considered to be subject matter experts, and—in many ways—artists of all types.
That’s how “truth” works in society. You hold many things to be “true” because you read them or heard them or saw them or felt them (even tasted them) somewhere, likely from someone of an occupation listed above.
At least, I hope that is the case. Please don’t tell me you are getting your “truth” from bad faith actors or the bloke that’s always at your local!