Because in fantasy perhaps more than in any other genre, the character is rewarded for making the right choices and punished for making the bad. Ask Boromir.
Give me my freedom for as long as I be All I ask of livin' is to have no chains on me All I ask of livin' is to have no chains on me And all I ask of dyin' is to go naturally. . . And when I die, and when I'm gone There'll be one child born, in our world To carry on, to carry on. . .