Nick Carraway puts his finger on a big part of the problem (and on part of the reason I gave up on television news a long, long time ago). A snippet (emphasis added):
Instead of educating, the radio and television networks have chosen to incite. Of course, this is not universally true. There are people that give terrific background on key issues that could educate the public. The problem is that even with those few people, the education is used as a tool to persuade. It is a powerful tool and an effective tool, but it is still a tool at the end of the day.