"Software is not like milk" is exactly the point: the author's observation is that (some) people treat software as though it had scaling economies like a commod

"Software is not like milk" is exactly the point: the author's observation is that (some) people treat software as though it had scaling economies like a commodity product, when in fact it does not. Software engineering would be like civil engineering if civil engineers had teleporters, matter-replicators, and armies of construction robots capable of building anything from a set of blueprints, without supervision. Software engineering is its own practice and the fact that it is unlike other forms of engineering is a feature, not a bug.