You're forgetting that self-censorship is sometimes the greatest pressure on editorial staff. These newspapers's primary duty, unless their staff have signed up to the Munich convention of 1971, could be seen to be to advertisers, and then to industry regulators who they're hoping to get some kind of booster shot/protection aginst nu meedja from; that, at least, is not the case at Wikileaks.
Self-censorship is also driven by editorial staff purposely biasing their reporting to reflect the political biases of their readership. There's a sizeable segment of society that thinks that reporting on alleged abuses in Afghanistan is akin to terrorist-sympathising.
