Saying Krugman is too emotionally invested in the book is an understatement. This is the man who claims to have wanted to bring about psychohistory itself as the natural evolution of economics.
He may be the only neoclassical economist to admit that, but most of them have the hubris to think it. I almost suspect Asimov intended a satire: "Humanity is complicated, but fear not! I have numbers, and those allow me to completely ignore humanity!"