Why do people feel the need to write stories with a sad ending? It literally flies in the face of fantasy storytelling that's been established for something like 6000 years. The first written story by mankind, The Epic of Gilgamesh, was an idealistic story about larger-than-life heroes that portrayed all the virtues of their time.
So why now do people write stories where everything goes horribly wrong and ends in tragedy? Even traditional 'tragedies' have some light at the end of the tunnel; by their death, Romeo and Juliet allowed their families to stop fighting, just as an example. Stories like this Anon wrote are just pointless.
Stories are meant to inspire and entertain. They are meant to drive us to great feats, to emulate the heroes, they are meant to warn us from evil and lighten our spirits, not destroy them and shatter dreams we have of a better future.
And above all else, people don't like reading sad stories. When the dreams we have are destroyed and the characters we love killed with no bright spot, it doesn't feel good. It defeats the purpose of the story; to entertain. Further, as this is a fantasy story, why not make it idealistic? It's not like the real world, where you EXPECT things to go horribly wrong; in a fantasy world where anything is possible, why can't there be a happy ending?