Listen, we get it: the romance between Superman and Lois Lane is a legendary part of the whole DC mythos. We don't expect any movie to ignore it. But romantic love between two close species on Earth, such as a human and a chimpanzee, would raise eyebrows (and charges). What are we to think of romantic love between two organisms that didn't even evolve on the same planet? This is a symptom of a larger issue in science fiction: so many aliens just happen to be humanoid.
Of course, it's much easier for audiences to empathize with humanoid characters, and it's much easier for filmmakers to portray them. But at least try to narratively justify why two totally different worlds would produce something as specific as the human body, especially since all the other animals on Krypton are pure alien (speaking of which: where can I get one of those awesome cicada things Jor-El rides? I'll take better care of it than he did). There may well be some kind of super-species out there in the stars, and perhaps a savior from their planet will immigrate to Earth one day, to protect us from untold cosmic dangers. But this hero would probably have sixty eyeballs, a dorsal fin, and a million butts. Just a guess.