I agree that they aren't plotting against freedom, but not for the same reason as you. I think that they want to make money, and think that controlling content is best the way to do that.
Of course they want to make money though. They are a business. However, they've forgone more profitable business models in the past in favor of tighter control and they'll likely continue to do that.
It's hard to argue that they've forgone more profitable business models, as they are in the top 10 most profitable companies in the US, and are the most valuable company.