A valid question, and a valid answer:
Not every area has 700 MHz. operations active these days. I think Illinois was the first, starting about 3 years ago with StarCom21 sites in the Peoria area. There are a few others now too. For this reason many people don't know about this new band and when they hear about it for the first time they are curious.
Don't worry about some posts seeming grumpy, it is hard to properly express emotions in non-real time text, and it sometimes comes out well, grumpy. The content of the post is correct though, it has been discussed at great lengths in various forums here at Radio Reference and other places but not everyone searches all the deep dark corners of the forums before posing questions.