You should consider the probability that in the past when newspapers deceived the public, the deception went largely unnoticed (at least at the time.) For instance, there is the time American newspapers almost single-handedly started a war with Spain.

Or, even worse, the infamous case of Pulitzer Prize winner and genocide denying communist sympathizer Walter Duranty using the New York Times to promote Soviet propaganda during the Holodomor. The damage there is still ongoing, despite the NYTs coming clean half a century later. When HBO's Chernobyl mentioned it by name, that was the first time many Americans ever heard the word.