Beyond a certain breadth, an overload of specificity becomes too vague to engage with. Claims that cover such wide ground are impossible to refute or dissect.
The people who do it think they're well-informed and providing a service, but it's poor form. It forces readers into a poison choice: abandon nuance to pile on in blanket agreement, or bash their heads against each other bickering in 50 threads about 50 tiny points for eternity.
No good comes from that.