Is There a Geometric Unit in a Proposal?

In the yang mill's case, we have no substructure. We're doing the most simple minded thing we can do by taking the norm square of the curvature and saying, whatever the field strength is, let's measure that size. And in the iron stine case, looking only at the scale of curvature. So if each one of these is simplest possible, doesn't a lem's raiser tell us that if we wish to remain in geometric field theory, that we've already reached bottom?