Somehow, the show is wildly entertaining and dearly emotional, but if you look closely you'll find that it does not resemble real life on any level. They gorge themselves without gaining weight, they reference every movie, book, and TV show but you rarely see them consume anything, and Rory has a boyfriend so obsessive he basically stalks her but he never even tries to get in her pants.
Television is our safety, our constant. Much like reality and real relationships, we can't always count on it not to hurt us. Just like our own selves, these characters have flaws. No one lives a perfect life, not even a fictional television character, no matter which pair of rose-colored glasses you wear to watch.