Well it's half the equation alright, building a nice model is the other. Lets face it, its about preparation. If you are going to build a model for a photo contest then you are doing yourself no service if you don't find out how or find someone who can take good pictures. Excuses like, "I'm just a kid/I can't a afford/all I have is a camera-phone/don't know how" just don't wash. Because odds are you know somebody with a decent camera. A friend, neighbor, family member, a teacher....anybody, who has a digicam with a macro setting.
It's got to become part of your build plan. Build, paint, polish, pictures. Plan ahead. By the way Bandit1, this little speech isn't aimed at you, I'm just ranting in general, and just using your post as a jumping off point.
Congrats to all the winners and everyone else who tried their best. You know more for next time and thats how we all get to the winners circle.