The only thing really holding back public transport is lack of imagination and ambition. Just because things don't work now doesn't mean they can't if you actually try.
When we have discussions like this, the “normal case” is actually that people live in cities, so that’s obviously what the conversations gravitate around.
I grew up in a small town (4k pop), and there’s no reason bikes shouldn’t be extremely effective in town. It’s tiny! There’s no true need to drive a large, inefficient vehicle .5mi to the rite aid or McDonald’s. Nearly everyone in this tiny town is within quick walking distance of what used to be a passenger train station. It could become a passenger train station again with the right investment.
People living in truly rural areas is an edge case where cars obviously make sense. Even then, the majority of car trips are local. 60% of trips are fewer than 6mi.
0: https://www.census.gov/programs-surveys/geography/guidance/g... 1: https://www.energy.gov/eere/vehicles/articles/fotw-1042-augu...
Edit: meant average, originally put median
If you can hop on a bus within a 5 minute walk of where you live, and then hop off withing a 5 minute walk of where you work, life is beautiful and you can probably ditch your car (at least for daily commute). For most, this is not the case.
And I don't want to live in a ultra-urban area.