Because it is a beautiful show! Full of wisdom, love, insight, humanity. And humor, on occasion.
But it does have pain. Like life.
And, it's good entertainment. And a distraction. And, it's fiction (I stopped watching or listening to the news some time ago, because it made me too sad).
That's all. I watch stupid-funny stuff sometimes (hubby is a huge Adam Sandler fan, lol). Like the Wedding Crashers, the Hangover, ya know?
Guess the short answer is: Cuz it is just great TV. Like Breaking Bad. Flawless.