To say that one does not watch TV because there is only garbage on it is no different than saying one doesn't use/do.....alcohol, sex,religion,food,exercise,sports,whatever....because there is so much garbage associated with it.
You can enjoy everything above to enrich your life or you can abuse the same things and trash your life.
Regarding TV, at BITOG it does seem that many non-TV viewers portray a bit of self righteousness. I don't get it. I could make the same argument about craft beer drinking, or obsessive environmentalists, etc..
I enjoy a bit of television. I like movies, very occasional sports (usually local teams), some diy shows, nature, history. Seeing images of 911 and similar distasteful things keeps me in touch with reality a bit.