Why doesn't Lester defend his son in the tale of desperaux?

In "The Tale of Despereaux," Lester does not defend his son, the mouse Despereaux, due to his own fears and insecurities. He is overwhelmed by the family's expectations and the traditional norms of mouse society, which stress conformity and fear of humans. Lester's lack of support reflects his internal struggle and inability to embrace Despereaux's uniqueness, ultimately contributing to the themes of bravery and individuality in the story.