He asked: "If it's thought that it's the right of adults to see drama that reflects their lives, then why isn't that a right for children too?
It's not a right of adults to see drama that reflects their lives, so the premise of the question is wrong. Although if it is a human right then charging for the licence fee must be a violation of that right.
Anyway the fuss over American culture being represented by children's television programmes to the point of crowding out British culture seems misplaced. First of all there is precious little incentive to make programmes for children when advertising to them is heavily restricted. Secondly this sort of cultural exchange works both ways, the success of Harry Potter has probably influenced American culture at least as much as British culture has been influenced by American imports. I don't see any complaints about that though.