One has to wonder at their thinking about the "grade" of movies they produce. Yep, they are "B" movies most of the time. The blonde that screams a lot. The plot that almost makes sense. The lack of proper theme music for the bad guys. Oh! The list goes on and on.
But look at Netflix and some of their offerings such as "House of cards", quality film! Or even some of the offerings from Showtime or even HBO.
Clearly it's not a matter of can't do it, rather it seems to be a matter of won't do it.
Perhaps they worship Roger Corman.
http://www.imdb.com/name/nm0000339/ While not a giant of the industry he sure is prolific.
They may just be filling programming time rather than trying to make an impression on the viewing public. After all they are really selling advertising time just like all the other channels. The programing just defines the demographic they are selling to.
Even so, would be nice to see something on the level of "Firefly" instead of "Shark whatever".