Maybe because:
1. Headlines don't equal reality. Do we live in a worse world than before, or do we just have better ways of spreading information, and that such headlines tend to sell more than more benevolent news?
2. They perhaps wouldn't be doing anything about it anyway. Many cynics tend to be complainers rather than complainers + doers. What good does it do if you're a cynic if all it does is that it makes you sit around and mope? And if you are living in a good place with good people, and you aren't out to change the world having a positive outlook might be better for you own good than worrying about people in distant lands that you don't intend to try to help anyway.
Have you ever read The Sun Also Rises?? Hemingway struggles with similar questions and he's a far better writer than I am!! :)
The media is making money by reporting on "things that could kill you". It's getting more efficient at that over time, so if you do watch the news - and I implore you not to - you will start to believe the world is a bad place. That is because you will never, ever hear anything positive in the news. Because it won't sell.
For every crime in this world, there are ten million selfless acts of love. If the news reported on both equally, it'd be very boring. You'd constantly hear about somebody helping another, or putting somebody else before themselves, and you would never even get to the crimes. Not enough time.
For every murder in this world, there's a friend risking his own life for another. Or 10. We won't know. For every war, there's a million times more peace.
Look at the facts, people. Is it so hard to understand? Is propaganda, dull, dumb, and effective as it is really so hard to get around? Open your eyes, and turn off your TV, newspapers, and the associated websites.
There are three reasons why watching news is a huge waste of your time. 1 - negative bias to an extreme that is hard to imagine, as described 2 - non-actionable items. Each time you consume news in any form, ask yourself: What can I do about it? What do I have to do about it? Why did I need to know this? Am I just rubbernecking here (hint: YES, you are!)? 3 - Propaganda and lies. I used to read my local paper front to back every day. And there were a handful of reported-on news where I was an eye-witness. A demonstration, an accident involving me. And even for these harmless items, the news was just plain wrong. THIS WAS NOT WHAT HAD HAPPENED. But it was in the paper. Facts had been altered. Not even maliciously, just to make better story, or because the journalist on the ground couldn't see everything, or whatever. Now if the stories I had direct first hand knowledge of where wrong - how about all the others I knew nothing about? How accurate is that going to be? It's not.
And war propaganda. Just read up on Goebbels, every nation in the world is today doing the same things, and the patterns are so easy to spot you will wonder how you could ever miss them. All the media, particularly in the US, but also other countries, are full of it.
That said, I didn't read it as a dismissal or even outright cynicism. Rather, it seemed like a personal experienced they wanted to share as a bit of a warning. Which I think is really good, because I and many people I know feel similar looking back.
But looking back in that manner doesn't mean I don't look forward with hope. It just means that I wish I'd been a bit more careful at times about what I pursued, as I definitely feel more of a struggle in the energy department that I didn't feel a few years ago.