Yes, Virginia, there are wombats in Wonderland, as you should know because Digger just won the Hugo for Best Graphic Novel. I loved Digger. But I didn’t expect it to win. Firstly, it was in black and white (unlike all other entries), secondly, it had no babes in it, let alone naked ones (alright, there was a young priestess, but she was veiled and mostly bald, so I didn’t count her) and thirdly, it was a complete story from beginning to end (unlike all other entries).
Why would a complete story line disqualify a nominee? Simple. People vote for their favorites. Some fans (like myself) see their Hugo ballots as a sacred responsibility. They pour over the nominees, weighing every word and agonizing over the choice when (as often happens) several candidates are worthy. Others approach their vote (and I’m not criticizing, just observing) with light-hearted cheer, partial to their favorite authors/artists/etc. even before they start reading, and dismissing other entries as casually as a junior editor burrowing through the slush pile of Sisyphus. Some fans even join WorldCon solely to nominate and promote a specific work. Again, I do not criticize. They are driven by love. But whatever the technique, however much thought does or does not go into it, it everyone votes for the one they like best.