He is the archetype, the bigger than life, perfect specimen of humanity whom we can always count on to do the right thing and to triumph over problems. He reminds us that the struggle to accomplish our goals is do-able, is right, and is fun. He may be James Bond triumphing over world oppressors and countless villains. Luke Skywalker triumphing over universal evil. Indiana Jones triumphing over Nazi thieves.
Adventure movies sell better than any other kind of movie.
When you write an adventure movie, you must know what motivates your audience, even as a vicarious experience or release, because that is what must motivate your characters. The second category of movies is about people who do change. It's about discovery. In contrast, in adventure movies you know the end. The good person is going to triumph in the end - you know that before you walk in the theater.