If each cul-de-sac just had a walking path cut out of it, I think you'd have the ideal. That's what it's like in small-town Holland. Cul-de-sacs do have other benefits like a quiet street and keeping your little kids "corralled".
I agree. There are good reasons to want to live on a street that doesn't have a lot of traffic. (That doesn't equate to a cul-de-sac, although they trivially fit the pattern because there is only one end.) One of the problems with the street layouts described here is that pedestrians have to follow the same winding routes that the cars do. Another is that the larger, heavier-traffic roads aren't nice to walk along, e…
Why do they have to? I don't see why you couldn't build a more natural walking path away from the street traffic that would be less objectionable to homeowners since there wouldn't be the automotive noise and danger to children.