Fair enough in the sense that their exact origin isn't stated so I can't point to a passage and call you a damn casual. I will note that breeding them doesn't mean they didn't start as some kind of ainur or whatever.
I'm curious how you think Ancalagon the Black is a pure product of animal husbandry though.
The Witch-King can fight a wizard for the same reason elves can fight and kill the greatest dragons and balrogs themselves. Binding creatures of spirit into physical form both weakens them and makes them vulnerable to other creatures built of both natures. If anything, as a wraith, he has an advantage in Tolkien rules.
That the Witch King is the equal of a balrog/Maia is not a stretch... Gandalf bring afraid of him even if he is a threat is the stretch, but I'd also argue that's not being shown in the scene.
And they specifically have their "betas" transition as Trans-inclusive radical misogynists lol. Which certainly seems like an explanation for why we're not hearing much of the Kirk shooter's trans girlfriend.
It doesn't need to be deep fam, it's pretty embarrassing to scaremonger about Russia when your neighbor is the American Empire that has made specific territorial threats against you.
It also means a person's personal vocabulary... Aka a personal dictionary.