A city planned for humans is automatically difficult to access with private cars (gotta have narrower pedestrian-only streets, public transport), which are requ

A city planned for humans is automatically difficult to access with private cars (gotta have narrower pedestrian-only streets, public transport), which are required to get away unseen smoothly in case of legitimate kidnappings. A city planned for humans is dense, walking anywhere alone your kid is seen by a neighboring grandma, the likely existence of whom in any of the hundreds of flats within earshot also acts as a deterrent. In a city optimized for cars, easy access by a car means easy way of transporting a number of large firearms without being seen.