There also needs to be a more objective element when talking about parents as well as placing them as the cause for teenagers to start gambling, sometimes they also want to have more time to pay attention to the child but being busy in return for adequate materials and facilities is still more favored, they also just want to build a good environment for a family. In some cases, imitating parents is also relatively unreasonable. Obviously, at this time it is difficult to prevent teenagers from experimenting on social networks.
You see this aspect of people believing parents can completely control what their children will do—the kind of things they associate themselves with—and the rest of them are limited. Like you said, you can't control what the children see on social media.
Even if you go as far as restricting them from having access to devices that are connected to the internet, will the parent also obstruct them from social interaction among friends? There are many ways in which children can just learn what they want and reshape themselves. What parents just need to do is be the children's best.
Being a father to three myself, I can't help but agree with you, as disappointing as the knowledge of this may appear, it's absolutely the truth, because normally, a typical parents would want to have their kids do only what they(the parents) want, and pleases them(the parents), and because of this very burning desire, parents usually get very frustrated and totally disappointed in their children when they see the child doing or living a type of life they never have envisaged for that child or their children.
But the truth of the matter (like you said) is that, parent can't really (like 100 percent) control what their kids do, or engage themselves in, because if you as a parent can get the child under your control when they are at home, how about when they are out there in school, and other social gatherings where you as a parent couldnt be present due to one reason or the other?
I think as parents, what we really do is to keep advicing our children, teaching them the wrong and right things to do, it's up to them to learn for the betterment of their future.