The irony is that parents feel like their kids are safer and more sheltered when they restrict their movement, while the opposite is true.
There was never a time in history where kids would be targeted and manipulated by corporations as today. The digital phone is a marketing gadget that brainwashes us to constantly interact with it. In extreme cases, every aspect of our lives is being scored, monetized and compared. Everything has become a hyper individualized hustle.
To make it a bit tropey, a sheltered kid is much more susceptible to people luring them out of their safe space with promises of excitement and Things Their Parents Would Not Approve Of.
Of course, the data (e.g. teen pregnancies) shows that this isn't a universal / statistically provable truth, but still. It makes sense in my head.