I can't help but think that thee's some sort of tragedy of the commons type thing going on here. Probably the wrong metaphor. But: it seems like a lot of what the article is getting at is that we can all intuitively agree that the population of children in society being more independent is good for a healthy society (or not just intuitively I suppose, he backs it up with mental health data). Any given parent can know this. But even if you know it, can you knowingly accept doing something that causes a 1% chance of losing your child in exchange for a 99% chance that they'll grow up better off? It seems most parents can't.

then why did every previous generation of parents do it?

most parents can, its just illegal now.

I call bullshit. The parents that WANT to let their kids roam free are stymied by "helpful neighbors", aka busybodies who simply will not let kids be alone.

I've seen it too many times: CPS or COPS (!!) called on children "unattended" outside -- even when it's really obvious their parents are watching through a window. Let's ALSO not gloss over the fact that CPS & police are used by neighbors to harass each other.

Let's say the simple truth: *US Culture is a literal abomination and its getting worse not better*