Cinderella Man Cast Away

Why is the music in this trailer for Ron Howard’s film Cinderella Man the Alan Silvestri score from the Robert Zemeckis film Cast Away (heard as the last track on this album)? Is there so little film music in the world that it must be re-used? Is this some sort of “people who liked Cast Away will come and see this, so let’s use the same music” device? I feel used, mostly because I cry every time I see the “I thought you were dead” scenes of Cast Away.