I think reality television is/was a cost-cutting measure on behalf of the network stations. Imagine the savings when instead of having to hire writers, producers, directors, camera and other technical people, not to mention actors. A lot of trouble and work goes into actually writing fiction, whether it be in book form, film, or televsion; its a lot of bother writing scripts and good stories and dialogue and such.
I think this profusion of "reality" television is indicative of the fact that some genius network executives took the saying "Truth is stranger than fiction" far too literally and to too great an extent.
Reality television is the template now. So certainly the networks are going to try everything to "improve" it every now and again; and so its going to get crazier in order to try to sustain and increase ratings for the network.
That's why I barely watch television anymore. My shows are: Without A Trace, Criminal Minds, Charlie Rose, The SImpsons, American Dad, Seinfeld, King of the Hill and so forth. Not one of them, I am proud to say, are "reality" television shows!