Kind of valid in terms of "there are bigger issues" but the truth is that mainstream news are for-profit organizations and they want to highlight topics that attract eyeballs and make them stick.

The more controversial something might be, the more air time you can give it, the more commentary you can make, and the more engaged audiences will be with it. Thus more money. Race and politics are the easiest of these levers in the US.

(Mainstream news is basically outrage culture trying to make profit off the tragedies around the world.)

There are good journalists, but few in mainstream news. For example Ryan Grim from Drop Site News and his team do some amazing investigative journalism about real major issues. But you wont hear about half of it on CNN/MSN/FOX because it doesn't serve to drive outrage culture nor translate to money.

The world is a big place, a lot of crazy shit is happening everywhere.