I just pointed out that there's no "empty space" within atoms or molecules, even if you don't count electromagnetic fields. The common statement that "atoms are mostly empty space" is wrong (misconception). The "electron cloud" reaches everywhere and thus there are no finite volume elements within an atom which would be "empty" of electrons: within every such volume element you can find larger-than-zero electron density.
But I understand your point; it is the electromagnetic interaction which governs the way everyday objects react to each other. That, and the fermionic nature of matter.