Good for you if you never need a car, but other people need cars for work and family needs. What do you propose that they do?
Some people do need a car for work, healthcare, education, living with disabilities, or many other reasons not mentioned.
Perhaps there is some tiny fraction that needs a care. Well, there would be enough on-street parking left for them.
What is far more common is the a bunch of people that don't need cars hide behind the mythical empathetic car-dependent person.