Why does dr larabee told ahkeelah that he couldn't coach her anymore?

Dr. Larabee tells Ahkeelah that he can no longer coach her because he realizes she needs to find her own voice and independence in the spelling bee competition. He believes that she has the potential to succeed on her own terms, and stepping back will allow her to develop her self-confidence and belief in her abilities. This decision ultimately serves as a pivotal moment in Ahkeelah's journey towards personal growth and empowerment.