They most certainly ARE broadcasts. But what most people don't know is that the word "broadcast" was not invented specially for radio and TV. It was originally an agrarian term, and it denoted a method of applying fertilizer to a field. The reader may guess exactly what sort of fertilizer was used, and may also infer that "broadcast" has never wandered far from its original meaning, whatever the context.
LOL
Could you be talking about guano being cast broadly? Precisely! Good post.
I still think, given the network news content and it's overhwelming ficticious nature, calling them "shows" would be more accurate, since "shows" are typically associated with sit-coms or dramas, which are all fiction and make believe, just like the msm news.
Given the original meaning of "broadcast", ironically, what the news half hours are like today is humerously much like the original definition you posted. The only thing funnier than a joke is when the joke is as truthful as it is funny. 8) Thanks for that.