And there are few people who would argue against any of your reasonable points. If there is nothing to argue about then it is no longer newsworthy. You need two talking heads to take opposing sides.
Of course there are. There will always be conflicting viewpoints. But by leaning so far left or right (depending on which media outfit we are talking about), or towards unimportant "human interest" stories that distract from the real issues, everything becomes lost to an echo chamber of ideological purity whereby any sense of reason is lost to hyperbole, and by the end, little exists to resemble anything resembling a rational position - yet it is bandied about as the "party line" and the pom pom waving Democrats and Republicans support the rather ridiculous outcome of their party/media groupthink against their own best interests. What isn't lost to that becomes lost to an overwhelming sense of fatigue from the news cycle, such that escape is welcome, and thus the popularity of human interest stories and the like, which are really not newsworthy, but are designed to make people feel good momentarily.
This is why I don't watch TV news. I try to think of any internet news I read in the context of, this is going to happen regardless, how can I make my own life better by acting on this information?
Additionally, the whole concept of media talking heads "debating" on TV (rather than actual politicians) is foolish because candidate debates last far longer and really get into the issues, whereas TV personality debates or op-ed pieces are typically built around straw man arguments and attempts to characterize the opposition as ridiculously as possible to further one's own agenda. Which is of course, made easier, when both sides have their share of loony ideological purity crazyhat theories going around. And the TV segments are never long enough to actually get into the meat and potatoes of the issue, or allow the formation of complex opinions - the idea being you're either "with me" or "against me" - which is not the way that a society can solve its problems.
The way grown men and women are wrestling over control of Congress and the Supreme Court like children fighting over a toy is by far the most problematic of these symptoms, as our government has basically ceased to function for the people, but the wider symptom is the fact that as a nation we have lost much of our manners and civility towards each other on the basis of fake news and hyperbole, and many people voluntary self-identify with a caricature of their own political and economic views solely to comply with their party's ideological purity test, despite it not being in their best interest to do so. People now immediately judge others by their political views, don't step outside their box, and don't generate productive dialogue that calls people (including themselves) to question their own long held beliefs in a way that is not offputting. And yet, if you go outside, you can still have a BBQ, enjoy beautiful scenery that we haven't managed to totally destroy yet, mail someone a letter or talk to them through the Internet, see some of the most creative people on the planet on Youtube distributing entertainment product for free that is better than what is mass consumed for profit, and even just go meet up with someone and have a delicious cold beer you've never had before somewhere nearby thanks to the craft beer movement. And it boggles my mind that most people would rather make politics that intrinsic to their being that they wouldn't want to do any of those things with someone on the other side of the political fence as them, and would rather surround themselves in a positive feedback loop echo chamber regarding a bunch of things that they have
literally no control over.
Some of the nicest people I know are Trump supporters. Some of the most naive are Bernie and Hillary supporters. Yet, none of that changes the fact that I still think Trump is exploiting populist sentiment for his own gain, and while he occasionally does get something right, he is doing irreparable damage to the country in the process, particularly through his Supreme Court picks.