Well, you seem to have snipped too much, because your presentation of Orcs being bad because of metaphysical laws is the exact opposite of what I said in that post.
And, I said you're overthinking it. I seriously have no problem with orcs being free agents that are evil only because of upbringing, curse, or just overactive adrenaline.
There's also nothing wrong with saying "orcs are evil because they are". They're a made up race and, if that's one of the characteristics of them, so be it. There is nothing immoral in that.
Note: I'm not talking about in-game people saying that. I'm talking about the GM or game designers saying that it's a fact that is true. In that case, every PC/NPC trying to argue that you need to reform the orcs is a fool. Just like, if orcs have free agency, those saying "kill them all" are racists. It really depends on what you want out of your game.
As a game designer/GM, saying all orcs are inherently and irredeemably evil is no more racist/wrong/troublesome than saying demons/devils/angels/werewolves/slaadi are inherently aligned. It a question about game design. I have zero problem with WotC defining orcs as having free agency. As I said, before, that's actually my preference. Pretending like its some moral triumph or righting of past wrongs is pretentious and silly, though. Orcs don't exist. They aren't an allegory for any specific race/ethnicity/religion in the real world. If anything, they're an allegory for the brutishness and evil that is within any of us and a sort of "there, but for the grace of God" type thing, but I wouldn't push any deeper meaning too far. It's like all the emo Vampire: the Masquerade LARPers in the 1990s who though they were making deep commentary about the world.