@jesusmargar Joseph Campbell spent most of his life showing that all human stories are really the same. Dune and Star Wars ARE the same story, two of countless versions of The Hero's Journey. So are Harry Potter and Lord of the Rings, the latter more proudly affirming its roots. Like Campbell, Tolkien understood all this. Lucas really didn't, but he did know that he was rehashing old human stories. Most of Star Wars is a sci-fi remake of The Hidden Fortress, which also wasn't wholly original.
@wesdym there are stories with collective protagonists that are not like this. E.g. Cela's La Colmena and, to a lower extent, GoT or The Wire.