Thats why most of Hollywood is made of idiots.
Why was Titanic so successful? because they killed the main character off.
People are tired of happy endings. These days when you watch a movie you know no matter what happens there will be a happy ending.
If the main character had AIDS, cancer, leukemia and ever other disease you could think off some bird would magically fly by and shit on his face and cure him. Thats Hollywood for ya. Full of bird shit.