What rhetorical advantage may kināyah have over explicit statement?

Taʿrīḍ, Talwīḥ, Ramz, Īmāʾ and Ishārah; the Rhetorical Force of Figurative Speech

• Cancelling all dictionary meanings
• Reinforcing a quality by presenting an associated sign
• Always negating the intended attribute
• Necessarily changing the original addressee