The author cherry picks scenarios to support his viewpoint. I'm sure that San Franscico residents are aware that a 2 mile bus trip makes no sense for an able-bo

The author cherry picks scenarios to support his viewpoint. I'm sure that San Franscico residents are aware that a 2 mile bus trip makes no sense for an able-bodied person, but those are two very specific criteria. Where is his evidence that 2 miles is the distance that the majority of people need to go? What happens when you do need to go more than two miles?