To get str 14 she has to be able to press 170 lbs.STR - 14 just means her strength is a bit above average, and if you want to argue physical fitness, remember she regularly sneaks out of the keep, so she does get some physical activity.
17 int isn't pretty intelligent. It's basically a genius intelligence.INT - 17 she is pretty intelligent, enough to be an effective wizard. The fact that she's rather naive has more to do with WIS than INT.
9 is an average wisdom, not low wisdom.WIS - 9 She's naive and a bit clueless, WIS doesn't have anything to do with her being kind-hearted; that would be something relating to her Alignment.
Anyway, she has 3 stats above 15, including 1 18, which is pretty over the top.
