Brevity alone does not prove rhetorical conciseness. To establish ījāz, show that the intended sense remains complete while needless words are avoided.
An expanded paraphrase might describe how legal deterrence protects people from killing. Such an explanation brings out implications of the compact original, without making the original defective.
Compare “iyyāka naʿbudu,” where restriction is central, with “wa-lakum fī l-qiṣāṣ ḥayāh,” where concentrated meaning is central. Similar English labels must not erase distinct Arabic technical uses.