Guo Moruo was very filial when he was a child. Once, my mother got carsick. Guo Moruo didn't know where he heard that plantain flower could cure this disease, so he wanted to get one. But this kind of flower is very expensive and rare in the market, so he and his brother ran to a garden to look for it. It happened that the plantain in the garden had just opened a big yellow flower, and Guo Moruo and his brother secretly picked it and gave it to their mother. Although my mother knew that Guo Moruo was very filial to her afterwards, her son's behavior made her very sad, so she educated him and told him to be honest in the future. Guo Moruo kept this story in his heart until he became a great scholar in China.

In the last sentence, the author questioned the loss of confidence and courage in picking banana flowers?