We don't get to pick our own bodies, though some of us struggle mightily to customize the model we end up with. One of the most interesting parts about fictional works, however, is that the creators of fiction — whatever medium they work in — get to build a world. They get to create whole entire races of people. They choose names, loaded with meaning and cultural allusion. They get to decide how characters act and speak. And they get to choose what characters look like. It's an amazing opportunity. I cannot understand why so many game developers squander it by making the same dubious choices over and over.
When gaming started out, it was aimed at a very specific subset of the population, and technological limitations kept the graphics vague and the stories on a very elemental level. Now, just about everyone is pushing pixels in every direction, but games themselves don't reflect that. Out of the wide panoply of the human experience, you get one type of girl, dressed for one aim. And that aim is often not the task at hand.
The issue is three-fold: The clothes don't fit the job, the character's body type doesn't fit the job, and the way the work or the training would change her physique aren't reflected in her design.