Am I (and others on my side of the issue) that much smarter than everyone else? No. The key to understanding this is that the anti-Keynesian position is, in essence, political. It’s driven by hostility to active government policy and, in many cases, hostility to any intellectual approach that might make room for government policy. Too many influential people just don’t want to believe that we’re facing the kind of economic crisis we are actually facing.
And so you have the spectacle of famous economists retreading 80-year-old fallacies, or misunderstanding basic concepts like Ricardian equivalence; of powerful officials instantly canonizing research papers that turn out to be garbage in, garbage out; and so on down the line.