They kinda try to patch it up in the movie "Serenity". Supposedly the whole show takes place in a gigantic star system full of giants with dozens of moons amoun

They kinda try to patch it up in the movie "Serenity". Supposedly the whole show takes place in a gigantic star system full of giants with dozens of moons amounting to hundreds of worlds. They also have some form of terraforming tech to make inhospitable worlds habitable. Frankly I find that whole set up only slightly more plausible than some kind of FTL, especially since they also have gravity manipulation tech already.