There's subjectivity and objectivity. Urbanists love toying with both of them, as they'll be very objective in some areas (land use, zoning, Der Ewige Stroad) yet extraordinarily objective in others (macro level things like population growth/decline). What makes them so deceitful is that they confuse viewers into thinking the subjective is the objective, and that for example you can't have a healthy city unless you let dozens of immigrants flood in because it's the Right Thing To Do.
They have absolutely zero interest in trying to be nuanced on this, they have zero interest in researching or learning population theories - why and how migrants find housing, how supply and demand have changed due to recent immigration trends, etc. They'll pull the blueprints out to design a new bike lane, but ask them to actually prove why ceaseless migration is good for the housing stock and they'll scratch their heads and call you a Chud - because they don't want you to ask questions, they want you to focus on meaningless lifestylist design shlock and leave the macro processes to Breadtube