Chaosmancer
Legend
Maybe everyone in the fictional made up not real race that is an allegory for storytelling chose evil in a fantasy world that is not real because we are using them for allegory and not species like in Star Trek.
You know, we all know they aren't real. We get it. We understand that DnD is a fantasy world we made up that isn't real. We understand that every race in it isn't real. People don't have to repeat it every single thread to remind us that DnD races aren't real.
Because, you see, "it isn't real so it doesn't matter" is a defense that doesn't always work. Sure, if we wanted to ask how the Autobot digestive system works, we can say "it isn't real, so it really doesn't matter than much". But if we are asking "wait, since when can Optimus Prime teleport and clone himself to fight an entire army" saying that the character isn't real so it doesn't matter doesn't work. Because it does matter, you can't get away with just doing whatever you want. And questions of motivation and why villains do what they do can fall into this category pretty easily. This is why the autobots and decepticons history of being a slave race and their fight mostly being over the need for an energy resource, or looking for tools to use in the ongoing civil war matter. Because if they were just fighting each other to fight each other, it wouldn't make a lot of sense, or being a good fictional story.