ETA relevant links: https://youtube.com/@NotJustBikes https://letgrow.org/
ETA again: I glibly mentioned "being killed by a driver" but of course navigating the typical US built environment if you're under 16 or otherwise unable to drive is a miserable experience in a number of ways even if you survive it. Highways make pedestrian paths unnecessarily roundabout. Parking lots make everything further from everything else. Crossing major roads requires getting drivers to notice and stop for you (harder when you're short!), or waiting through interminable signal cycles, etc.
It may depends on where in the US you're talking about, but in my area none of this is actually true. Although lots of people believe it is.
I do worry about car on pedestrian crashes but the city has crossing guards and traffic calming for just this.
Where are these places that you can’t be outside as a child?
So, every winter, there's a pile of kids standing at the bus stop. With their parents waiting nearby in idling cars. They could quite literally walk their kid to school and back in the time they spend waiting for the bus.
And to make it worse, those kids are literally NOT allowed to walk home unless a parent is there to retrieve them. Otherwise the school will put them on the bus.
It's completely bonkers.