Earlier quoted context omitted.
Are you saying there weren't overprotective parents before? This thread is full of a lot of confirmation bias / society is going to hell in a hand basket type of discussion. Boy, kids these days, right? I'd like to see some facts because I don't find it very credible.
Talk to some older folks. My dad describes walking to school with other schoolchildren in Montreal in the 1950s. They'd be alone, without adults, going miles. When playing, they were out dusk to dawn on city streets with no adult supervision.
You don't have to talk to people that old, the mass retardation of parents is a relatively new thing.