I agree that the side that is more deceptive & manipulative in their persuasive tactics will tend to be the ones with less potential substance, my point was only that such a scenarios isn't necessarily the case. Even an "honest" person can find themselves coming to the correct conclusions for the wrong, faulty reasoning. In such cases They are only accidentally correct. In the hands of someone that understands that facts don't win arguments, but none the less believes their "side" is correct, it is all too easy to justify sensational, emotional arguments, rhetorical flourishes, etc in an "ends justify the means" sort of way.

I don't have an answer on the issue of news organizations being poorly suited here. On the one hand, there is an appeal to your the idea you convey that something is better than nothing. However, that status quo is also what has lead us to the current situation. There is a correlation with the rise of 24-hour news networks and the internet with the increased vitriolic, polarizing, and propagandist tone things. The need to fill air time was a big part of that. I don't wholly think that was the cause. There was some trend in that direction already:

Note to readers: This next part is not intended to cast blame only in one direction. It is simply one concrete example of the type of things that became commonplace.

Around 1990 Newt Gingrich penned a memo for titled "Language: A Key Mechanism for Control" It went on to explain how language could be used to manipulate people, complete with a guide for how to use demonizing dehumanizing language against political opponents. Over the years it was systematically disseminated through his party, and when Newt became house Speaker around 1995 he literally made it required reading. Shortly after is around the time that the term "liberal" went from being a fairly neutral description like "conservative" to being a hated moniker for a political opponent. (Though right-wing, alt-right, etc., fill that purpose. now for the other side)