There is seriously no end to the number of newsworthy things to cover. The problem is that there are limited resources for coverage. It's expensive to staff a desk full of people who can find interesting topics and tell good stories about them for every subject area under the sun. It takes a lot of people with very variegated kinds of subject matter expertise.

It's much cheaper to have 4 or 5 people whose main skills are theater criticism level analysis of political events (i.e. how does this play with various demographics) and a skill of manipulating emotions to spend all their time speculating over nonsense instead. Just put them in a suit and have somber music on and we can pretend this is a serious matter instead of idle gossip.