The model is unsound. Private vehicles on roads in cities cause a ton of pollution (and I don't mean CO2) that is very undesirable. Public/mass transport with good mechanisms for short journeys to and from hubs is a better model. The rise of ebikes and scooters is an encouraging alternative here too.

Yes of course there are times when people need a car, but they are not the majority of the time for the majority of people. And their severe externalities need to be priced in to discourage use.