Because then it’s just a movie set in space.
What’s a 007 movie without a Bond, a psychopathic villain, and a pretty girl? A spy movie.
That’s not a fair example and actually does Star Wars a disservice. Bond movies are about a specific character. Star Wars was just a space movie about good vs. evil. A better comparison would be a Star Trek show without the Enterprise or Kirk or Spock or conflict in the neutral zone with the Klingons.