it probably just depends on the city. where I live, in a downtown area, I'm within walking distance (say <1.5 miles) of my workplace, lots of bars and restaurants, parks, gyms, a library, a post office, a farmers market, banks/credit unions, etc. so I usually walk to these places.
Yes, it depends on the city. but it also depends on the person. Sure,
you walk to those places, but do most of your neighbors? Likewise, in the only US suburb where I've spent significant time in the last couple of decades (the Almaden area of San Jose), I was within easy biking distance of all those things, and within walking distance of many. And I did walk & bike, though I doubt most of my neighbors did.
Even in my semi-rural current location, I can (and sometimes do) easily bike to stores, library, post office, &c. Even used to bike to work at previous jobs (the longest was a bit over 16 miles, through downtown), though these days I work from home. So it's mostly a choice.