Earlier quoted context omitted.
Not also to mention something often oversight. An autonomous car can park far away from it's user, meaning we could drastically reduce de number of space taken by parking in the city. First, giving back this spaces to the people as green parks and services places. Second, lower one of the biggest problem in our current city: urban heat island.
But then you’ll likely have a bunch of extra traffic created from the cars going to and from their owner to parking, rather than just to and from their destination. Or from the car just circling the block because the owner would rather not have to wait long for its return.
30 minutes before the show is over, you order the car to wait in the "no stopping" zone in front of the theater for easy access. You exit the theater and find your car is tangled in a mess of traffic that takes 45 minutes to clear as most of the cars are double-parked and blocking traffic, waiting for their owners. For the duration of the show, no useful traffic has been able to move for a mile in any direction, as empty cars are just idling around and are content to wait, fully stopped.
Tragedy of the commons.