This is pretty much it. I'm a parent now, but I recall my parents telling me to walk to get to appointments and activities when I was in school back in the 90s and 00s. I never did, because it was 5+ miles through car centric roads.

In the city, I see kids walking places on their own. Most places they would go are within a quarter to half mile, all of the schools that they could go to from age 3-18 are within a third of a mile.