I don't have kids but it seems to me that the way the U.S. is structured for middle and upper middle class families exacerbates the issue. Suburbs are not walk

I don't have kids but it seems to me that the way the U.S. is structured for middle and upper middle class families exacerbates the issue. Suburbs are not walkable communities. Kids don't seem to play in the streets in their neighborhood like I used to do when growing up. It's taboo to let a 10 year take the bus by himself or to be alone. Activities are much more structured and that means a lot less flexibility.