Why do we need redemption in cinema?

Kevbo provoked this question from an answer of his. I am well aware that this question has been disected in numerous books by well respected authors, filmmakers and critics but… they aren’t Fluther and most are dated by at least fifty years.

We are seeing a slight shift in American cinema, allowing films like There will be Blood and The Mist to break into the mainstream regardless of their highly unconventional structure, with those exceptions aside, American cinema is still very feel good, even French cinema, known for its endings involving the main character’s deaths, holds a sort of redemption within the tragedy, but why is that necessary? I am aware of our own conflicts as humans, desiring to see a hero nearly destroyed by their opposition only to rise triumphant in the end, but are there other reasons beyond our own humanity and insecurities?