Although you are correct and GP was mistaken in their definition, `reflect` fits better here.
Definition of reflect
transitive verb 1 : to prevent passage of and cause to change direction
// a mirror reflects light
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Definition of deflect
transitive verb : to turn (something) aside especially from a straight course or fixed direction
// armor that deflects bullets, deflecting a question
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With deflect, something is simply being diverted, whereas with reflect, it's more intentionally being aimed somewhere. This is the nuance I feel innately, although at this point we're splitting hairs I think.