Because sometimes, there aren't two sides to an issue. Sometimes "fair and balanced coverage" is engaging a false dichotomy, one side of which is batshit insane. Sometimes merely acknowledging a party or stance, as a news organization, is socially and journalistically irresponsible. There's a reason, for example, that the New York Times hasn't ever launched an investigation into President Obama's birth certificate, or whether or not Karl Rove is actually a lizard-man: because to do so would NECESSARILY, merely by virtue of existing, tend to grant legitimacy to an utterly-insane point of view, and a toxic group of people who espouse that view.
Gamergate?
Gamergate is like that. There's no defending it. Not even a little. The journalistic duty to fair, truthful coverage does NOT mean that any and all points of view are equally valid and worthy of examination. It is the case that sometimes a particular point of view is simply wrong, either factually, ethically, or both; and offering legitimacy to that viewpoint, through your authority as a gaming culture outlet, is equally wrong.