Those who want to maintain historic standards of journalism will have to make them explicitly part of their identity. Or will you say, we will print here only what we believe is true - the more classic definition of journalism. As journalism changes, taking on multiple shapes, each news organization must decide what kind of journalism it is practicing. If you veer in various directions, you will antagonize and confuse not only your readers but your reporters. The news organization must make it clear to those who work there that these are the values in place.
Journalism is part art, part literature, and very little science.
Reporters are motivated by the values of the institution and by a sense of mission. They need to know what the mission is to thrive. A news organization must make these values clear to the audience - in effect, making a covenant with the public about what it stands for. This covenant is critical. It is the only way for the audience to fairly judge what it thinks of a news organization.