There is a role for the government in enacting paternalistic legislation mainly aimed at protecting children. Parents may well welcome this kind of support. It might, for example, mean that certain products cannot be advertised during prime viewing time for kids, that some will not be available to teenagers below a certain age (though there's no need for it to be the full age of majority), and so on. Governments can launch their own
Our current drug laws are way, way beyond that point. It's time to decriminalise, and in fact legalise (but regulate), the main recreational drugs. That is a more liberal policy and a more humane one.