Every time people lament changes to the lore that amount to “not every member of species X is irredeemably evil” and claim the game is removing villains from it, I think how villains of so-caleld evil species fall into two cathegories: a) bland and boring and b)have something else, unrelated to their species going on for them, that makes them interesting.
What you’re describing is closer to the nuance I’m interested in than WotC’s settings. If you read some of the later Lolth stuff, it’s the exact opposite of that. Evil is bad and the justification for anything always involves this trite movement from evil to good. They’re not presented as counterbalances or equal combatants. Even evil characters seem to always be working under the assumption that good characters are ultimately better.
The 40k universe has a lot of similarities. However, I’d argue its authors are somewhat better at presenting why Chaos is an equally valid choice or why the Orks can do whatever they want. There isn’t a clear choice (some authors are fucking terrible at this and drive WotC-style to the goodness of the Imperium).
The only reason WotC has to remove alignment from races is because WotC has made it very clear there is the thing people should want and there is the thing people should not want. That’s not an even layout of nine alignments. That’s a huge bias and all of their content reflects that.