Advertising is there to tell me about products and services I didn't know about. I find that useful, and so do most people. Advertising (when done well) can be funny, witty, clever, artistic, etc. Sure, you get a few ugly adverts, just as with anything else.

I'm guessing it's mainly a "I haven't owned a TV for years/I hate consumerism/Anti-mainstream" type thing at work here...