Earlier quoted context omitted.
Biologists have complained for years about fear-mongering by the media when it comes to certain scary animals (sharks probably being the #1 victims). It's not that the media is lying per se, it's just an overstatement of the danger presented by these types of animals. It's not a conspiracy to lie, just sensationalist journalism (a problem, but much less sinister)
He's promoting distrust in the media and this is dangerous for our democracy.
There is a wide gap between "the media sometimes sensationalizes things that are traumatic and scary which causes people to believe that these events/things are more common than they actually are" and "this person is systematically sewing distrust in the media as a means of properly moving information from one location to the other, thus destroying the media's credibility and undermining our free society".
The whole "fake news" problem, wherein people just attempt to discredit factual information they disagree with by claiming it isn't real or important, is not the same as a person pointing out a well documented (and discussed) trend in certain segments of the media to go for "click-bait".
You're not arguing that click-bait style writing isn't real, right? You're not going to try and tell me that a research associate somehow knows less about his field of study than some random member of the media, are you?