> If you don't want your children to become addicted to something, be a good parent and monitor them. It is not the government's or the society's responsibility to babysit your kids.

It's both's responsibility. There's a reason why many countries forbid, for example, television ads that directly target children. As a parent you cannot completely shield what your kids are exposed to, many aspects of life are outside of your control (e.g what types of ads appear on your videos/TV) and that's where it becomes the government's problem.