There is a difference though, centuries before cars they didn't have trains/metros/drones/airplanes so the streets were the ONLY venue for transportation/logistics, thus necessary.

That said I don't believe a city without cars will work unless it's planned for that before building. Basically all everyday logistics would have to be underground. Obviously it would only work for very densely populated areas.

I'd like to see something like that though. Small densely populated areas connected by trains/metros and surrounded by forests.