I've not seen Rings of Power and I don't plan to, but I'd just point out that the Silmarillion describes the origin of orcs as being an exploited race of intelligent beings, elves who were captured and tortured until their forms became what we know as orcs.
"... all those of the Quendi [elves] who came into the hands of Melkor, ere Utumno was broken, were put there in prison, and by slow arts of cruelty were corrupted and enslaved; and thus did Melkor breed the hideous race of the Orcs in envy and mockery of the Elves, of whom they were afterwards the bitterest foes."
"... all those of the Quendi [elves] who came into the hands of Melkor, ere Utumno was broken, were put there in prison, and by slow arts of cruelty were corrupted and enslaved; and thus did Melkor breed the hideous race of the Orcs in envy and mockery of the Elves, of whom they were afterwards the bitterest foes."