i think i probably know the answer to this question (money) but i ask it more as a lament. as in a fan of the original trilogy screaming up at the sky “why!?!?!?” the first three movies were so good. “a new hope” and “the empire strikes back” are absolutely amazing movies and “return of the jedi” still rates as a good movie (though i believe you can see the beginning of the end in the ewoks).
knowing when to quit is such an important skill.