The first hurdle is the Western obsession with "objective" reporting. No such thing exists. But in the pursuit of the appearance of objectivity, you get slanted news constantly disguising itself as authoritative truth. Sometimes you get the same phenomenon on Wikipedia but at least there, interpretation of data is kept to a minimum.
There is so much to report on, and so much information to curate, one has to employ a particular world view to decide what part of the story is important to tell.
When it comes to news, there is no way to avoid ideological siloing. A single 'wikipedia of news" is not possible, but maybe several of them, each devoted to a certain way of understanding events, is possible.