So they're taking one thing they can measure and then kind of hand-wavey suggesting agriculture is the problem, and that's it.
In the past, we have been overly eager to right the wrongs in nature, arrogant enough to believe we knew how, and as a result caused massive ecological destruction. Every time we intervene, we screw up, because we really don't have a handle on the complexity theory of nature. But none of that makes it into a story that's mainly there to fill the space that an advertisement doesn't take.
I'm sure that the loss of insect populations is a major problem. But I'm also sure we have no clue how to fix it, and that the attempts will be very messy, possibly even worse. To me that's more scary than the immediate problem.