The problem is that most fan artists learned to draw from fantasy, superhero or otherwise heroic genre artists, and they tend to know only one body shape and one age. It's a problem I haven't completely overcome yet, but at least I'm aware of it. I'm not saying this artist is not capable - proportions, anatomy, etc, are proper, and the posture is expressive and natural - but there is still that difficulty in thinking of different body shapes, proportions, ages and degrees of health and illness.