I have owned a car, but that was twenty years ago. I do have a four year old kid, but it's not an issue having him in a seat on the back of my bicycle (or my wife's bicycle), and he's getting near the point where I'm comfortable training him to cycle on the road next to us on his own bicycle (he's been riding it since 3½ on the sidewalk).
Hurray for Dutch bicycle infrastructure.
Financially owning a car makes no sense for us living in a medium sized city in the Netherlands. The author of the opinion piece lives in London, where it makes even less sense to own a car.