TV is viewed as a "lower order" pleasure by many, irrespective of what you are actually watching on it. I've read as many crap books as I've watched crap tv shows.
This ^ is spot on. Yes, there is loads of rubbish on TV, but there is also loads of rubbish in print. You can be just as selective about what you choose to watch as you can be about what you choose to read. There is some excellent stuff on the TV - from the educational programmes that teach you so much about the world (including, but not exclusively David Attenborough), to film, drama, entertainment and sport. There is also excellent stuff in books. All 3 of my dc were avid readers when little and continued to be throughout teens and into adulthood - somehow they managed this with both TV and internet in the house, and, oddly, they even managed to be active 'outdoors' dc too. None of this needs to be mutually exclusive - life is about balance. Indeed, there's nothing wrong with watching some mind-numbing crap every now and then, or reading something that others might look down upon.
not helpful to any child to be brought up in a bubble, hermetically sealed from current entertainment, art, journalism and technology.
This ^ is very much what I was getting at in my first post, yesterday, but much more eloquently put 
Being able to discuss the 'big game' last night, or even that horrific article on the news (as adults, not as little ones, obviously) is helpful as 'conversation' throughout your life.