What's is important in the news?

I wonder if, when the Archduke of Austria Franz Ferdinand was assassinated,in 1914, people at the time, even realized that this death would be the pilot cause for the starting of the First World War? I doubt it.
How many people in the world knew who Ferdinand was, and who cared about it? I wonder if the press, at the time, even realized the major consequences that assassination would bring?
Even now days, people will probably pay more attention to big star news, then to any disturbing, and apparently minus, tragic event in the world.
Who’s to blame? Us for caring for gossip details, or the press for creating a prolific money resource?
You can say that no professional journalist can guess what events+consequence can bring, I think that, if they are a real good journalist, they can, at least apprehend and analyze upcoming events.