I have a license but don't have a car (actually owning a car was too much of a hassle) and you're only telling half the story. Yes, day to day not having a car is fine, but every once in a while you want to buy something larger that is not delivered, or move some stuff, or go for a short vacation, or even just drive out of the city to pick some mushrooms and you're stuck. You either borrow/rent a car or skip on the activity.
A car does provide a kind of freedom that public transport simply can't. A car that drives itself, or, even better, a car that I can cheaply rent that will drive itself to my doorsteps, then drive me wherever I want to go, and then return itself would be absolutely perfect.