There's been a destruction of the commons in general, and no place where people are allowed to loiter outdoors without falling under suspicion or actually being arrested. Children are also people. When I was a child, I hung out in the streets all day.
The trapping of children was just the prelude. Adults are also trapped at home, especially when they don't have any money to spend. Even if they do have money, there are no places they can go where they are expected to interact with strangers. The number of adult virgins has gotten absurdly high.
We have a tool that we could use to fight that: adult education. We have state colleges that we could be trying to attract adults to, rather than acting like people are done learning at 22. Chicago had/had a network of "Field Houses" that are community centers associated with parks where you could teach a class, or have a local group meeting, etc.
Instead, people are isolated and atomized into perfect little consumers who can't share things and can't organize politically except through an online petition encouraged by a "social network."