Cars are often still used as a method of transportation, especially among people whose life or work happens to fall outside a few dozen cities with dense population and work and stores one can walk to. That guy living in Leader Heights, Pennsylvania, isn't driving from sheer cussedness, he's driving because work is in York, or maybe Shrewsbury or Baltimore, and because the supermarket is five miles away.

If he were richer and more influential, he wouldn't be in Leader Heights, he'd be in Baltimore or Philadelphia.

There's also things like commercial deliveries, where putting a pallet on your back or trying to fit it on a bike is... unrealistic.

Cars ar comfortable. There's an aspect of control of personal space that you don't get on public transportation.

I've used public transit almost my whole life, but recently I'm becoming seduced by those evil cars. If I take the subway during rush hour, I can barely get enough space to read an iPad. If I don't travel during rush hour, I don't have dinner with my family.