The main issue is that unlike micro or other sciences, there are no experiments. Which is somewhat frightening. There have been something like five or so actua

The main issue is that unlike micro or other sciences, there are no experiments. Which is somewhat frightening. There have been something like five or so actual macroeconomic experiments performed. There is no precedent for what we have done, and for what we are doing. Even the most knowledgeable macro people are still limited by the fact that their models have little evidence tying them to reality (look at the debate between neoclassicists and Keynsians today). Macroeconomics people are somewhat stuck, they don't have enough information, they don't necessarily have consistent models. As a result, it's hard to tell the difference between the nutjobs and the experts. And that gives the nutjobs a large sway where they otherwise wouldn't. Furthermore, basic economics is taught to a lot of people (I learned it in high school), which gives them the (false) idea that it is easy (which high school/intro college econ is).