Whenever you're trying to force in material between commercials, you get 'hyperactive news' and newscaster tend to throw things up on screen without proper thought behind it.

Even Fox news spends little if any time trying to offer a comprehensive view of the world, but they spend too much time complaining that CNN is not doing the same.

I.e., none of the commercial news outlets really tries to offer careful and comprehensive presentation of everything that's happening, but rather they tend to go for commentary over just "Joe Friday" presentation.

The commercialization if part of the culprit - you want to get viewers to come back after the commerical airs and to do so you try to make it as exciting sa possible rather than as circumpect as possible.