1. The celebrity news stories like Kardashian events are designed to be weird/tacking/salacious soundbites, both entertaining and annoying - so they tend to be promoted in the news as something that gets attention while sparking discussion and keeps people engaged.
2. Too many shootings, wars, negative stuff, and people tend to turn off the news, especially if it seems unrelated to their lives. Car bombings in Iraq, Buddhist school teachers beheaded in Thailand for teaching Muslim girls science, seems unrelated to life and unimportant to most.
3. The liberal media bias results in not wanting to report things that make Islam look bad.
BBC Scrubs ‘Ali’ From Munich Killer’s Name On TV, In Articles, AND On Social Media
It’s not only Germany that covers up mass sex attacks by migrant men... Sweden’s record is shameful
And they don't report stories that make Democrats look bad.
WikiLeaks Makes DNC Look Bad - Banned on Facebook and Shadowbanned on Twitter
End result - many of the important stories are reported because they don't further the official story / propaganda.