What a load of crap. Hollywood/TV doesn't have a lot of leverage because they're crooks. They have a lot of leverage because they sell a non-fungible product. People don't just want to watch a show about advertisers with a lot of sexist banter--they want to watch Mad Men. They don't to watch a movie with some random hot guy, they want a movie with Channing Tatum.
It's the same market dynamic that makes Apple and Louis Vuitton what they are except even more extreme. LV sells purses and so does Kate Spade and so there is competition there. But only Warner Brothers sells Lord of the Rings, and other swords and sorcery movies aren't fungible with LOTR.