As Kaikeyi’s demands led to the unfoldment of the Ramayana why is she considered the symbol of ignorance

From: Yaskadeva

Hare Krishna Prabhuji, Many times we hear in maharaj lecture that kaikeyi is the symbol of ignorance and due to her ignorance she caused pain to ram and sita and all citizens. But my doubt is that kaikeyi ‘s boon may apparently seen as ram’s banishment but because of that only ram could forest and eventually he could kill ravana. If her curse would not have been there ramayana would not have been there. Please reply prabhu.