Thats because the broadcasters aren't using the channels correctly to gain viewer ship... I think the original intent was to launch multiple networks so that they could more readily compete with cable channels that have more specific programing.. But then all the networks started gobbling up cable networks, and the concept has become more of a niche local programing outlet rather than a national outlet with more mainstream programing (not news stuff)
I hear you.
Over in Southeast Asia, they've started using digital TV just like you described, a way of providing more actual programming.