Almost 25% of Americans are rural as well… bikes and public transportation are never going to work for them. In fact, cars don’t always work for rural folks - a lot of them benefit from (if not outright need) trucks.
I always get confused by people saying public transportation makes no sense for rural people. I think it makes more sense, provided you use the right kind of public transportation for the right kind of rural community.
A large, spread-out community? Perhaps not so much.
But a small town where 80% of the people commute to surrounding cities? That'd be a great case for 1 or more commuter train, depending on direction and demand.
If we could solve transportation for 75% of the U.S., I would be pleased.