Obviously, you have different standards for useful information than I do. I tend to listen to people who know what they are talking about. Anything else is a waste of time.
Consider politics. Larry Sabato has a great record of predicting election results. I will listen to him, because he devotes his entire life to political science, is thorough in his analysis, and has consistent results. I won’t listen to James Carville or Glenn Beck - because they really don’t know anything about it, they are often wrong, and their message is always the same - Carville will say the Republicans are screwing up, and Beck will say the Democrats are screwing up. With only so much time in the day - why would I listen to Beck on horserace analysis when there are others who can give me real, reliiable, meaty, tested information?
A major problem with Beck, Olbermann, Maddow, etc is that they, by the very nature of their job, can have no in depth information or objective analysis. They are presenting on too many topics - the economy, foreign policy, cultural issues, etc. And not one of them has done with slightest bit of in depth study on any of these topic, nor can they - because they have to prepare for a show, media appearances, etc, and because they are only going to present one side of the story. I’ve never heard of Rush or Beck praising Obama, or Maddow praising Bush. Why on earth would you spent time listening to these people? Their function is to rile people up, not educate or inform. Information and truth isn’t part of the job description.
In essence you are accusing me of beng narrow-minded. I have standards. Beck doesn’t meet them - not because of his opinions, which I can agree with sometimes, but because there is no substance behind his opinions. That isn’t odd. What is odd is that anyone would listen to someone who has absolutely no expertise in anything other than entertainment, and no time for much other than preparing for a show, whose viewpoint is predetermined, and who needs to pontificate on virtually everything under the sun. It’s a bigger waste of time than listening to Lady Gaga on auto repair, actually, because Lady Gaga doesn’t have any reason to lie about cars.