"Fake news" is only a problem for those who are afraid their status quo is in danger from it.
That is the only reason this topic was brought up into our consciousness in the first place.
Therefore it's easy to conclude that the term "fake news" was actually born because of the real culprit behind the problem was "inconvenient news".
"Fake news" was and is just a cover story, made up by people and institutions threatened by truth being exposed at their expense.