That's not the point, most people have the impression that the trending news is automated and generated by some sort of algorithm. It's highly misleading. The trends should really be called "Facebook's Top Picks" instead.
Children believe in Santa Claus and the Easter Bunny. Is it shocking that they're wrong?
Trending implies humanity cares about it, which to the lowly average-joe means humanity cares about it, so s/he should too. This is the part that feels disingenuous on Facebook's part.
Of course even average-joe knows (though probably can't express) that everything around him just wants to consume his attention, so I'm also not overly concerned about it.