I mean… even in Japan (basically the mecca of public transit), you need a car for a lot of “last mile” transit to smaller towns. And you want a car for many (most?) towns because there might only be two or three buses per day.

Makoto Shinkai’s movies LOVE to focus on this as a way to build tension. Have one of the characters spend two or three days taking a long chain of trains and buses to reach the one that they love only to have to spend the night at a motel in a nowhere town where they can then have a heartfelt talk about what they are actually looking for.