This is the key insight. If you want not insta-news but deep, correct, insightful information, you should read publications that still employ multiple copy editors.
I for one work with a bunch of newspapers where these roles are still highly respected today; their presence alone explains why the output quality is much much better than their competition's, all other things being equal.
Typically, these people are authorized to edit any content needed without necessarily getting the writer's approval (it's baked into the writer's contract). They catch typos and fix grammatical errors, of course, but they will also check every single sentence multiple times for inaccuracies. They phone third parties, check that every word used is the correct one, make sure dates and events are exact, check arguments for syllogisms, fight with the author at times for the use of a particular word or expression in lieu of another, and so on so forth.
No matter how senior and respected, the journalists always approach these people with fear and awe when they get quizzed about their articles. Any approximation results in either the whole sentence getting axed or the author being forced to rewrite and resubmit (on their dime).