A Muse on a Heroine

A trend of thought seems to have emerged in The Hunger Games fandom. When people think Katniss Everdeen, they think of a strong, powerful heroine. Katniss has basically become the symbol of young girl without a single weakness.

Why do so many people assume Katniss Everdeen has no weakness? Where does Suzanne Collins state or imply in her Hunger Games trilogy that her heroine has no weakness?

Nowhere.

( So what gave people that idea? )