I agree, yes it is the weakness of 24/7 news stations. At the same time there is a substantial difference in the quality of arguments between say CNN and Fox News. Also one can notice that 1 station, is more inclined to softening the differences, which is, in my opinion, not the right thing to do when 'the other side' openly supports and incites violence against those that disagree). Do we call the British and Americans 'biased' prior to WW2? Yes they were. Biased towards reason. Remaining silent when authoritarianism and fascism rear their ugly heads requires that we act and not passively watch it unfold. The diffoculty is that, as with the nazis, those following authitarian demagogues are convinced that their authoritarianism is either non-existent or warranted. Just keep repeating that anyone against you is a communist. Normal people would not believe that this capitalist, millionaire, corporate, conservative democrat, has any affiliation with communism. Yet Fox is happy to give air-time, and credence, to such spurious claims. A portion of ill-informed, poor thinking, frustrated people then love to become part of the tribe that really believes this stupidity. The same level of baseless stupidity cannot be claimed for CNN. But that is precisely why you can't trust them right? Those intellectual, arrogant elitists with their arguments are based on fact and reason. Biased? Sure. Dangerous? To the contrary.
What is dangerous is to equate channels like CNN and MSNBC with the likes of Fox News and AON.
The reason Fox News gets away with it is that in their charter many shows are qualified as 'entertainment' and not as 'news'. This frees them from journalistic standards, facts and reason. Anything goes. Hiding behind 'Freedom of speach' to incite violence against the very system that provides them with freedom of speach. CNN and MSNBC are held to a higher standard.