Maybe i am out of touch because we own our car outright, but its not nearly that expensive for us. Even with a parking spot rental.
Try adding in the cost of depreciation and it makes a lot more sense. I owned a used car for 10 years and didn't commute using it for most of that time, so it didn't even rack up that many miles. It still cost me over $500/month on average over that time period including depreciation, maintenance, gas, registration, and insurance. I'm sure it would be a lot more if I drove as much as the average american. Though I think the average is probably somewhat skewed towards the most expensive cars.
Needless to say I am now happily car free. $500/month can buy me a very nice ebike, as well as more taxis or hourly car rentals than I need.