Still can't wrap my head around the "fit the story" argument. The characters are the story and if you're writing in a completely fictional universe you can generally do whatever the hell you want. Unless you're in franchise fiction and breaking the rules of the setting, but I'd say Star Wars rules are pretty damn liberal. Everything boils down to execution. You could have a cyborg, transsexual, Jawa jedi raised by Wookies if the writer has the chops to pull it off. Hell, even from a modern standpoint the "makes sense for the story" thing doesn't hold alot of water. Does a Muslim, Chinese, eunuch explorer fit the story for historical fiction?