I don't understand this part, I read it quite often but... well, we are a family with young children, and although we do have a car we only use it once a week to go to the grand-parents that live 100 km away from here.
A city with less cars is great especially for families (though I would argue that cities themselves are not so great for children, but the comparison here is between cities that are car-centric or that are not). It makes going out easier and more spontaneous.
It's much less of a hassle to hop in the cargo bike and go wherever (including stopping en route if you see something interesting) than having to use the car, sit in traffic, hope you can find parking space at your destination, and pay for it.
I have very two kids, plan to have three. Cargo bikes are not practical, are easily stolen, and are not safe to transport children, especially under 6 years old. Besides, when doing groceries for 5 once a week, I regularly fill my 500L car boot, so an equivalent cargo bike with at least 3 seats and a large boot... would just be a car. Which you have, and use once a week.
Or when you need to go to the doctor. Or when your wife is sick. Or if you have an urgency. So, as a family, you still need a car.
Well I just have the reverse experience. My cargo bike is practical, has not been stolen yet and up to four children under 6 are fine to transport in it. I don't feel it especially unsafe.
I also use it for groceries. Sometimes using both the cargo bike and a bike trailer (on two different bikes). We don't buy nearly at many things though it seems. When I do use my car (doing groceries while the children are with the grandparents) I have to transfer them from the car to the bike anyway because I can rarely park close to my home.
My doctor (and my wife's doctor) is certainly easier to reach by foot than by car. And I guess I never have the kind of urgency that would require me to use a car in the city. If there's something urgent a bike is always faster in this city.
In the 60s, Dutch anti-car protestors had the slogan "Stop the child murder!". People were used to traditional cities where children could safely cycle around, but then cars came and started killing them.
I don't understand this part, I read it quite often but... well, we are a family with young children, and although we do have a car we only use it once a week to go to the grand-parents that live 100 km away from here.
A city with less cars is great especially for families (though I would argue that cities themselves are not so great for children, but the comparison here is between cities that are car-centric or that are not). It makes going out easier and more spontaneous.
It's much less of a hassle to hop in the cargo bike and go wherever (including stopping en route if you see something interesting) than having to use the car, sit in traffic, hope you can find parking space at your destination, and pay for it.