Fear based media.
It gets them views. More views = they get paid more.
"If it bleeds it leads"
I agree with you, but as a poster above said, more and more 'gore' is creeping into mainstream media...
I remember the Tunisia incident and you saw on the BBC One news that looked like half of the woman's arm was missing from so much blood. The worst part with the broadcast news I've noticed, very few say/warn about distressing images anymore. I see it a lot for Newsday and such.