Rational good and evil concerns the extent to which reason can judge acts good or bad and what normative conclusions follow. Some arguments for the best being obligatory rely on the move from “reason finds this preferable” to “Allah must do it.”
The Sunni response separates three stages: recognizing value, affirming divine wisdom, and imposing an obligation upon Allah. The first two do not automatically establish the third.
Without that distinction, terms such as “good,” “wise,” and “obligatory” get exchanged as if they had identical logical consequences. They do not.