Not all divisions are the same. Actual division separates a body’s material portions; imagined or supposed division marks portions within an extension without physically cutting them apart.
Material entities are discussed in these terms because they possess magnitude and extension. Once divine magnitude is denied, it is inappropriate even to divide the divine essence into imagined spatial halves.
Distinguishing several divine attributes conceptually does not amount to dividing the essence into bodily components. Treating plurality of descriptions as material part-structure would confuse logical distinctions with physical composition.