I clearly said I buy for two and would go more often if I shopped for more. Many, many people with families do this.

I'm in Norway. Vehicles are expensive, children (regardless of age) are used to going outside and going to the stores. It is a common situation in larger cities. Heck, elementary children are often enough at the store unsupervised. I'm not sure why you think a 20-30 minute car ride plus at least an hour at the store is worse than a 20 minute round trip to the store with a 10-15 minute store break is bad, even if it is a few times a week. And even that can be avoided by just spending a little time on your way home from work.

I have a family of four and we manage just fine. The kids aren't toddlers any more (which only means that we can't put everything in the bottom layer of the stroller), but when they come to the age where they eat a week's shopping in a single sitting they will be old enough to take over a few shopping trips on their own.

yeah, I think people come at this from very different life expectations. It is hard to take a toddler, a weeks groceries, and 50lb bag of dog food on a bike or bus.

Living without a car is easily possible, lots of parts of europe do it. They do it by living in small aparments, consuming less with more staples