If it's really that difficult for parents to engage their children and parent them, maybe that says more about a society that doesn't prepare parents for parenthood than it does about those who don't have children.
As a parent myself (and, I hope, a good one), I have found it very difficult to effectively monitor and limit my children's ability to access these things. And I have more facility with technology than the average parent. It's a complex and frustrating problem and the stakes are high.