This. The authors point is analogous to "we shouldn't do the census because everything is a result of human activity, and humans are really smart". Well... peop

This. The authors point is analogous to "we shouldn't do the census because everything is a result of human activity, and humans are really smart". Well... people study psychology and others study economics. As computational and modeling power goes up we have the newfound ability to blend the micro and macro further. But historically this wasn't the case.