Architects and urbanists are fascinated with cities that are shrinking, like the Rust Belt cities. Or, alternatively, we are fascinated with the growth of favelas and informal settlements. The 2008 financial crisis made these changes more extreme. The subtraction protocols rehearse a way of thinking about multiple properties in counterbalancing interdependence - not just the shaping of one property but the ratcheting interplay between properties.
Annoyance arises from the feared implication that we are copyists in subject or treatment, or both, whereas the common qualities that establish the relationship result merely from a similarity of method.