Krugman won a Nobel prize in economics. Like him or not, you can't use him as an example of a "journalist" writing about a technical subject with which they have no expertise.
My argument isn't "all books are good". That would be a stupid argument. My argument is that these rules suck.
W/re economics. We have the likes of Fukuyama and Krugman who have influence on Americans with regards to economics but who are often taken as oracles, rather than accepting they are economics thinkers who can be wrong.