or someone that's considered poor, can't afford one.
Public transport is nonexistent in several places here in Texas for example - you have to have a car (or know someone who does) to get to your job in the first place. But commuting puts wear and tear on the car, especially if you can't find work particularly close to where you live.
Yes, there are some places where public transportation both exists, doesn't take most of your day, and is cheaper than cars. Those places must be great, but as a 3rd worlder I barely know them (it's not a huge problem for me, personally, it's just enraging).