This should get easier: market economies are famously results of human action, but not of human design - any given result may be the effect of an agent's action, but not necessarily its intended cause. Thus, such results are not fundamentally different from, say, storms: effects of physical causes but with no intent behind them.

The conspiracy theory of economics remains prevalent, however, and very difficult to disabuse people of. So I'm not sure this is that helpful a handle to disabuse people of religion.