From Calvin’s perspective, his treatment of reprobation is fully consistent with his principles. Following his pricniple that we should ignore nothing that God has revealed for our use, Calvin discusses and teaches reprobation through metaphysical categories (in distinction from structures) and theocentric concerns precisely because he believes he finds such categories and concerns in Scripture.
Joel R. Beeke, Debated Issues in Sovereign Predestination: Early Lutheran Predestination, Calvinian Reprobation, and Variations in Genevan Lapsarianism, 104.