I think the point being made is that Facebook, NYT, et al. are not in a position to moralise about journalistic ethics.

I would go further and say that the half-truths being peddled by these outlets are far more dangerous than obvious non-truths peddled by "fake news" outlets, because seeing through their lies is much harder.

If we live in a world where "fake news" has been successfully censored, but the merely partisan outlets remain, the only result is people being lulled into a false sense of security: "It has to be true -- fake news is banned!"