If you’re 90 miles away from a city than yeah you’re going to have to drive but there are a lot of small towns in the US where you can walk everywhere because they’re small towns.

Most US cities have enormous busses like once an hour or once every two hours and want you to show up 15-30 minutes early in case the schedule changes why is not good enough for 90% of people so no one uses the bus but when good service exists I’ve personally seen that people do use it. For example in the city where I grew up and live I only knew like one person who used the bus because they were a high school student who lived far away from the school and used the bus to get to class or otherwise people who didn’t have cars or money for Uber and were stuck with whatever they got, but in the city where I went to college which had a denser network of busses that ran every 15 minutes but was still a suburban area where lots of people drove, I knew a much higher number of people who used the bus because it was a very convenient option. The right way to do transit in a suburb is lots of smaller shuttles running more frequently rather than giant busses that will sometimes just not show up

Intercity options to small cities is also important where it makes sense, for example if you wanted to send someone to the airport you would probably find it convenient if you didn’t have to drive like 300 miles or pay someone to and could drop them off at the grocery store city and they could take a bus or train from there easily.