PC is the consensus of journalists, what they can all agree on. To stray outside of the consensus is to risk starting a flame war with other people who buy ink by the carload. Each stays inside the consensus so that they can retain the label "objective" which journalists bestow on each other. To question the objectivity of a fellow journalist who has not strayed from PC is to stray yourself. And then you are "not a journalist, not objective."
A guy who is an occasional fill-in for a bay area conservative talk station tells of when he was the weather guy for a bay area TV station.
As I recall, he was completely ostracized and shunned, simply because he was a conservative.
Behind the scenery, there was not even the pretense of objectivity.
I believe that this station is more likely the rule than the exception.