I'm just pointing out obvious ways in which you have selection bias here.
FWIW googling, allegedly 1 in 10 people in rural america do not have a license. Or at least that is the claim floating around the internet. So yes, i think figuring out if this is a real issue should include both checking on rural and urban people, along with many other demographics. It is not obvious how this situation differs between urban/rural.
Wait, are you telling me that rural populations have less proclivity to drive?