I would love to use public transit, or even bike to where I need to go, but I live in a more rural area. The nearest, decent hospital is a 30 minute drive. A better hospital? Nearly an hour. Work is a 30 minute drive past farmland and lightly forested areas. No buses run between towns, since they're so far apart, and the train only comes around 1-2 times per day.
Basically, where I live we have no choice. Even the buses that run in town have rather inconvenient schedules, making it hard to get to where you need to go (in a timely manner, anyway). Lots of places are like this in the US, unfortunately.