I get you. I use a similar argument against people like Michael Crichton who claim that weather and climate are too random and chaotic to model. After all, all of those laws and the constituent laws, including Coulomb's law do a pretty good job of making this here computer work despite the fact that those electrons are highly chaotic. Given enough computer power, we could exactly model a circuit, but the point is it doesn't matter. The macro-laws we already know work well. Lather, rinse, repeat for climate models.