I wonder how much "fact gathering" ever got done. The Woodward -Bernstein myth of the "intrepid reporter" may have been mostly that, a myth. In reality reporters are used by various and sundry actors - you want to get your version of the story out - you call your friendly reporter - so it's not wearing out shoe leather pounding the pavement - it's answering the phone.
In reality, as you said, the brave reporter sits at his desk and waits for the press releases to arrive.