That is: it's a plea for a dodge of responsibility by media organisations themselves.
My conclusion is the opposite: we need better reputational and accountability systems and institutions. The idea that a media channel, editorially controlled, AI heuristics driven, or "wisdom-of-the-crowd" determined, can act in complete disregard (or open opposition) to the truth and reality, and fail to be held to account, is a key problem.
To those who respond with "but who then would determine the truth": these institutions are already determining at least the perception of truth, through what they promote. Repetition, as the WSJ article and its cited research show, create impression of truth. And whilst not all ground truths can be known, some can be well established, as can be deliberate campaigns to obviate and obscure truth.
Dante's deepest circle of hell was reserved for the betrayers of others. But immediately above this was the circle reserved for the bearers of false witness. An arrangement in an age where virtually all information was conveyed through witness, either oral or spoken testimony. Much of the social, religious, and communications institution of the time was devoted to establishing the importance of truth, and the consequences for falsehood, where independent verification was difficult or impossible.
Advances in information technology have offered increased opportunities for verification, but also broken down many of the foundations of trust in individuals and institutions. Some recent tools -- Bitcoin comes to mind -- are expressly founded on removing the role of trust within sectors of activity. This is a bad idea for multiple reasons, two of the principle ones being that trust itself has an extreme function in improving efficiency, and that its removal proves instantly and deeply toxic socially and institutionally.
We need to reestablish trust, adherence to trust, accountability to trust, and institutional trust. Information technology to date has worked in the opposite direction.
This ends poorly.