That said, my kid rode a bike to school from 5-10th grades in Arizona. She was the only kid that did that.
There are about 7 grocery stores within 5 miles of my suburban house. I have never seen anyone walk/bike to any of them. (I look.) If you tried to you would spend quite a bit of time navigating parking/road infrastructure where the drivers clearly believe is their entire right of way.
In Mexico you would think it would be much worse, but it is light years better. Kids take care of getting themselves to school in Paris, from what we have seen.
This idea that "unless universal, the claim false" is... not helpful. As a family in suburban US we did the bike thing. It fucking sucked.