Adult video game player here, happy to discuss why you think that's a problem.
Worse, as these are key developmental years for children, who themselves are not yet equipped to responsible decisions for themselves.
It is a vicious cycle.
Why does this attitude still exist?
And what kind of entertainment do you enjoy in your 30s and 40s?
Worse. The adults have to take the responsibility. The children need to learn first what is and isn't right.
Who is going to teach them?
At one point, everyone has to take responsibility for their own life. If we take the US limit of being underage until 21, then at 42 a person is an adult for the same amount of time. Plenty opportunities to figure it out.
Nobody has to take responsibility for anything, and most choose not to.