It's the rubber-neck gene in humans. Some day humans will actually be able to rotate their head completely around like an owl so they won't miss any of the blood and guts. Although Greta might look better if her head was on backwards, she is just following in the footsteps of the greats who have made their fortunes providing food for rubbernecks, e.g., Springer, Winfrey, Downey, Jr., and the many court tv shows hosts to name a few.
They used to be much more niche markets... when they're breaking into regular programming to cover this stuff live, they're making it mainstream.
I like to monitor the news all day while I work at home. This crap just shouldn't be national news.