I think you may have missed the relevant point of the consideration of
Orcs as
Automatons.
Tolkien had considered this only for the
First Age, or earlier, as if that was the only form of “
Orc” in existence then with
Morgoth’s banishment, all of the Orcs would have become
statues, unable to move or do anything without Morgoth’s
Will being focused upon them.
In the essays Tolkien wrote for himself regarding Orcs, this was one of the reasons he rejected it. Although, as I pointed out, that “rejection” was likely too hasty, as prior to the Children of
Eru awakening in
Middle-earth, this would have been a relatively effective means of producing “soldiers” for his use, that would have continued to be of use even after the corruption/perversion of
Elves and Humans created the
Race(s) of Orcs that could breed “biologically.”
One of the features that Tolkien most attributed to all other forms of “Orc,” though, was
Rebelliousness. Whether those Orcs were what Tolkien identified as
Boldoeg (very minor
Maiar), or whether they were “mere
Animals, without Fëar,“ and thus unable to
truly comprehend speech, although able to mimic it, as do parrots... Or whether they were corrupted/perverted Elves and Humans, all of them possessed, as the core of their being a “
Hatred of Morgoth, and of existence itself.” That made them especially “independent,” as you have put it.
But of any Orcs that Morgoth “assembled” (so as to draw a distinction with Tolkien obsession over “
Creation,” where Tolkien was freakishly overly literal) which were “automatons,”
Sauron’s
Will would have been inadequate to “Motivate” this population of Orcs, and at best they would have provided him with a few tens of thousands of automaton-Orcs that he could draw-upon in times of great need. But otherwise... At the capture, binding, and ejection of Morgoth from the
Circles of the World, all of the “Automaton Orcs” would have ceased moving, and basically become statues that sank beneath the waves with the rest of
Beleriand.
One of the benefits for having given little attention to Tolkien’s “Toy
Languages” (This is a linguistic term for an “invented language.” It isn’t a pejorative meant to diminish Tolkien’s work on those languages), and instead studied the Theology, Philosophy, and Metaphysics of Middle-earth is that you discover a
LOT of things that tend to leave many people wondering about, yet which Tolkien actually provided an answer to. It is just that these answers are not in the form of:
Many people miss these answers due to being focused
either upon the Languages,
or that they are looking for more “story” (a narrative history of
events within Middle-earth).
In any event... Teasing these things out of what Tolkien did leave is not an easy process.
While cloning could be a possibility for Orcs, it is something that would have been a likely impossibility within Middle-earth. It is a subject where there is a LOT of contention within the Catholic Church over, due to the issue of “Where does a Clone get its
Soul?”
It was precisely that issue that gave Tolkien such grief over the question of “What are Orcs, anyway?” And to a Catholic, the existence of, and granting of a “Soul” is a freakishly huge and consequential issue. I only know enough Catholic Theology to know that the whole Idea of Cloning a Human is utter anathema. Because doing so would mean a “Soulless pretender,” among other things.
That doesn’t mean that I, personally, agree with their stance... But only that Tolkien certainly would.
And we have a
LOT of different animals, and
plants, that are capable of parthenogenesis (producing offspring from what might be considered “unfertilized eggs.”
That would be another “no-no” in Middle-earth, however, because in Catholic Theology, Parthenogenesis occurred precisely once in our universe, in a poor Levantine girl named “Mary,” who was “impregnated” by the Holy Ghost by way of the “Father,” to give birth to himself as the “Son.” .... So it is very likely that had Tolkien been aware of things like Snakes, Crocodiles, Frogs, Fish, a handful or
Birds, and legions of insects, who were capable of producing offspring without the need of a “mate” (and it is ALWAYS the females who do this) he would have been unable to bring himself to allow this to exist in Middle-earth, even as an act of supreme-evil by what he identified as “Satan” or the “Diabolus” (that’s Morgoth... Tolkien regularly referred to him as “Satan,” and to Sauron as “The Devil”).
And... As I mentioned previously... It is not out of the
realm of possibility that Tolkien could have confessed considering such things as a plot device for his Mythology to his Priest, as having had “impure thoughts” (a pretty common “filler” in Catholic Confessions, but in Tolkien’s case, something he would very likely have actually confessed to due to his attempts to answer questions like “What are Orcs, anyway?”). And one of the most common orders from a Confessor to a Petitioner is to “Cease the activity that causes these impure thoughts,” which would have caused Tolkien to forever abandon that line of thought....
But in terms of simple Biology, we needn’t resort to something so elaborate or resource-intensive as Cloning or forms of Parthenogenesis. A simple CRISPR-Cas9 would be enough to gain the relevant traits needed to corrupt/pervert Elves or Humans to an Orc that produces Orc Offspring. And CRISPR doesn’t violate nearly as many “inviolate” Catholic Tenets or Beliefs.
But they are certainly methods (especially certain possible analogs to “cloning”) that Sauron could have resorted to in order to rapidly fill-out the ranks of an army.
And another area that I didn’t touch-upon here is the Predator-Prey Models that would be applicable to Orcs (who would be an Apex Predator in Middle-earth) that also impact how they came into being, or were “reproduced.”
But it is well-past my bedtime, now...
MB