I meant to write "WHILE no one advocates ..." and I mistyped "why no one ..." !!! :-D
Almost completely opposite meaning ! :-)

Clearly a state monopoly of mass comunication media is unthinkable - you can't "unbreak the eggs".
Indeed the correct way is to raise the awareness of the public. That can partly be done by the educative system. But in adulthood, the role of the educative system is taken by ... the MEDIA !

Hence by corrupting the media one can negatively influence that awareness of the general public !