Let's not cut it short. This isn't a digression, this is the subject at hand.

Calling lapses of journalistic integrity "slip-ups" is a disservice to serious journalism. Running a story without adequate fact checking because it will gain you viewers or because it closely aligns to your biases is a serious breach and shouldn't be downplayed, no matter what the ideology of the perpetrators are. The media is in a sorry state these days and this is a big part of why.

Edit: On second thought it's possible I may have misinterpreted your intent. If you mean that it's not worthwhile to delve into ideologically based score keeping, then I agree. I only object to the notion that we shouldn't highlight past transgressions, or that we should downplay them as effectively "accidents". In reality there is a history of effective hoaxes and "black bag" operations involving the press, in some of the most egregious cases where members of the press were fully complicit. That's worth talking about and bringing to the surface even if an attempted reckoning of the integrity of, say, Fox News vs. CBS is not.