Not only does it show Nadine's courage in overcoming the effects of the accident to pursue something she loves doing, but it also shows how misguided society in general is with respect to what makes a woman attractive.
Many people would look at Nadine and say she's too overweight (although they would likely say fat) to be a model, and then, when they found out about the scarring and other damage to her legs, they would give her even less of an opportunity to model, much less glamour modeling.
Granted, people have different tastes, and Nadine's shape may not tingle every man's dingle, but anyone who looks at her and says she's unattractive is an idiot.