Matt Taibbi has been using his journalist stick well for years, not afraid of who he pokes, just seems to trying to live up to traditional journalistic integrity.
The traditional view of the press was never based on some contrived, mathematical notion of “balance,” i.e. five paragraphs of Republicans for every five paragraphs of Democrats. The ideal instead was that we showed you everything we could see, good and bad, ugly and not, trusting that a better-informed public would make better decisions. This vision of media stressed accuracy, truth, and trust in the reader’s judgment as the routes to positive social change.
For all our infamous failings, journalists once had some toughness to them. We were supposed to be willing to go to jail for sources we might not even like, and fly off to war zones or disaster areas without question when editors asked. It was also once considered a virtue to flout the disapproval of colleagues to fight for stories we believed in (Watergate, for instance).