TV is social. Everyone is seeing it, which creates a whole world that can be talked about. As it is the world has too many +4 sigma cognitive skills (which will be partly IQ but also learned throughout life) with below-median social skills. It would be much, much more useful to have then be +3 sigma for cognitive skills and +1 sigma social skills.
I don't think it's the case with TV today. Not anymore. There are too many channels, and also significant amount of people decided not to have TV.
Watching Game of Thrones is social, whether you do it on TV or on-line. Watching a random TV program on a random TV channel is about as social as watching a random YouTube video.
Useful for them and useful for society.