Even if you lived out in the kanto plain where the trains came before the highways, its not like people are taking the bullet train to the grocery store thats a 5 min drive with the car you already own. Few places on earth are so dense where the car is actually a consistently losing bet when you account for all your trips. I’m not even sure what building for transit rather than car would look like for a semi urban or rural area, considering the transit with the lowest capital investment, the bus, is also benefited by car oriented development like a road network with more connections between nodes. Even in the times before a car, some people had a horse or mule to essentially play the role of a car today, of an instant express bus.