The philosophical account invokes a first intellect, further intellects, souls, and celestial spheres in a scheme of emanation. The maxim that only one can proceed from what is one is used in constructing that hierarchy.
The commentary contests the necessity of that maxim and the attempts to derive several emanations from multiple aspects within one intellect. Even if the descriptive model is internally detailed, its steps still require proof.
A coherent imagined hierarchy is not automatically a demonstrated account of what exists. Conceptual possibility, proof of existence, and historical description remain separate.