FCC is the big difference IMO as to why network tv can't do stuff like "Sopranos" and "Dexter."
I wouldn't let them off the hook so easily! The FCC is not to blame for the lowest-common-denomenator mentality of network TV. The FCC is not forcing the networks at gunpoint to trot out yet another uninspired season made up of cop shows, doctor shows, lawyer shows, sitcoms and yet more garbage reality TV. There are ways to create a quality TV show without recourse to excessive sex, violence and swearing.
Lost does it.
Pushing Daisies did it.
The real thing that is to blame: the necessity of making TV for a mass market because your only revenues are from ads. Get another revenue stream, and suddenly you have more options.