Even those of us who do have private garages end up having to use them for other purposes like storage, home gyms, workshops, etc. In high cost areas it's exorbitantly expensive to buy a larger home so people use the garage for other purposes and park their cars on the street.
Most people with garages don't park in the garage, they park in front of the garage. But you can still plug the car in when you're parked in front of the garage.