Strongtowns has this blindness about how most Americans live. Look at this quote:
>you’d see higher-end restaurants, organic groceries, day care facilities, hardware stores, boutiques or bakeries or doctor's offices, depending on the mix of residents nearby.
Yeah obviously if you're well off it's awesome to live in walking distance to these things. But most people aren't. And the suburban home where you drive to a grocery store is a way cheaper life than living in Madison
Also, I don't think the parent post by harimau777 was comparing specifically with suburban single family houses. A like-with-like comparison in the same or similar neighborhoods seems more appropriate. I was more addressing his statement that "only the rich can have homes that give true ownership and everyone else is stuck in multi-family homes", pointing out that for many, multi-family homes are preferable to single family houses.
Finally, to your point of living within walking distance to various shops and services. Sure, high end shopss will congregate near high-income neighborhoods, but high density neighborhoods will attract businesses even if the residents are not wealthy, due to the density driving sufficient volumes to the businesses. Thus it's likely more a matter of whether zoning allows mixed use.
And it isn't a lack of space to build, Sweden is less population dense than USA. Lots of people still live away from things in detached houses, those doesn't disappear just because we give others the option to not live like that. And you know, thanks to most people living in denser areas most things aren't that far away from the detached homes either, they benefit from density too.