SpookyFrank
A cheap source of teeth for aquarium gravel
This is the point. I live in a city that is very well-served by public transport and didn't have a car for nearly 2 decades living here (was very lucky to be given one at a time when it became useful due to personal circumstances).
Where I live at the moment, I'd happily move to a model where you can pay a reasonable subscription or fee or whatever and jump in a nearby car to pick up something heavy, go off for a bit or whatever, but transferring that to rural areas (or even a shitload of urban areas) isn't easy.
In less densely populated areas it makes more sense to use the money that currently gets spent on cars to fund a pool of drivers/vehicles covering a particular area. You phone up, someone comes and picks you up and either takes you wherever you're going or drops you off at a place where you can access the wider public transport network. These services, formal and informal versions, exist for older people and disabled people already. It's just a question of scale.