Right now society (jobs, business interactions, legal obligations, etc) are generally structured around the common denominator of automobile transit. Your boss expects you to get to work around the basic parameters of what you can do in a car.
It's great to eliminate the car at some municipal level, now make "the bus didn't show up" or "there were no Uber/Zipcar/Car2Gos available" as some kind of universally accepted, legally unchangeable excuse for missing work, a court appearance, daycare pickup, etc.
One of the problems with the "yay, no cars!" world is that the rest of the world goes on making assumptions about people moving about that are based on the ability to get from point A to point B in a car.
Sure, in some places like NYC, a subway glitch will usually be accepted (in fact, I think they have a process for issuing excuse notes) and when I worked in a downtown office where there were a lot of bus riders, weather problems with the bus were generally not questioned or a cause for action.
But generally speaking society as a whole just assumes you're at fault.