Das denke ist so nicht ganz haltbar. Zu dem Thema des Wesens der wesentlichen bösen Protagonisten hat sich Tolkien in seinen letzten Lebensjahren sehr ausführliche Gedanken gemacht, und die sind glücklicherweise in der HoMe10 veröffentlicht worden. Dort schreibt Tolkiien daß sich Morgoth und Sauron in einem wesentlichen Punkt unterschieden: Morgoth war letztlich von einem nihilistischen Wahn besessen, der ihn alles hassen ließ, was nicht seinem Geist entsprungen war. Sauron dagegen war viel rationaler und ordnungsliebender.
Thus, as 'Morgoth', when Melkor was confronted by the existence of other inhabitants of Arda, with other wills and intelligences, he was enraged by the mere fact of their existence, and his only notion of dealing with them was by physical force, or the fear of it. His sole ultimate object was their destruction. Elves, and still more Men, he despised because of their 'weakness': that is their lack of physical force, or power over 'matter'; but he was also afraid of them. He was aware, at any rate originally when still capable of rational thought, that he could not 'annihilate'them: that is, destroy their being; but their physical 'life', and incarnate form became increasingly to his mind the only thing that was worth considering. Or he became so far advanced in Lying that he lied even to himself, and pretended that he could destroy them and rid Arda of them altogether. Hence his endeavour always to break wills and subordinate them to or absorb them into his own will and being, before destroying their bodies. This was sheer nihilism, and negation its one ultimate object: Morgoth would no doubt, if he had been victorious, have ultimately destroyed even his own 'creatures', such as the Orcs, when they had served his sole purpose in using them: the destruction of Elves and Men.
...
Sauron had never reached this stage of nihilistic madness. He did not object to the existence of the world, so long as he could do what he liked with it. He still had the relics of positive purposes, that descended from the good of the nature in which he began: it had been his virtue (and therefore also the cause of his fall, and of his relapse) that he loved order and coordination, and disliked all confusion and wasteful friction. (It was the apparent will and power of Melkor to effect his designs quickly and masterfully that had first attracted Sauron to him. Sauron had, in fact, been very like Saruman, and so stil understood him quickly and could guess what he would be likely to think and do, even without the aid of palantiri or of spies; whereas Gandalf eluded and puzzled him. HoMe10.Myths Transformed (Notes on motives in 'The Silmarillion')
Sauron hatte nichts gegen die Welt an sich, solange man sie ihn beherrschen liess. Seine ursprüngliche Tugend war es, jegliche Unordnung abzulehnen. Natürlich wurde er durch Melkor "angesteckt" hinsichtlich eines gewissen zerstörerischen Nihilismus (was in der Natur des Bösen in Tolkiens Mythologie liegt), doch war Sauron in dieser Hinsicht nie so tief gefallen wie Melkor/Morgoth und hat sich sein Faible für klar strukturierte Ordnung (mit einem klaren Boss an der Spitze) erhalten. Auch die Orks wurden durch Sauron strikt kontrolliert. Er hat sie von Melkor "geerbt" und das Beste draus gemacht, indem er sie für seine Zwecke einspannte.
Man beachte den Unterschied zu Morgoth, der im Falle seines sieges anschliessend seine Orks vernichtet hätte, da sie ihren Zweck erfüllt hätten und ihre blosse Existenz ihm jetzt ein Dorn im Auge war. Sauron hätte die Orks in Ruhe gelassen, solange sie seine Befehle befolgt hätten.