There were also little details in the movie that didn’t make sense, like that huge pig-thing that drank and wasted enormous amounts of water, which was no doubt precious, and had little conceivable purpose.
If you think about it I guess that makes sense, but wouldn’t the same apply for the dewbacks on Tatooine? And why do the Stormtroopers magically have one after landing to search for the escape pod? Were they really keeping them in captivity on the Star Destroyer to take with them on planetary missions?