Who defines what good is? Think for example of the pigs/cows that are about to be slaughtered for youtubers that do mukbangs.

Good and evil is all about perspective. From the viewpoint of the pigs, we are evil demons. If you want to judge, be ready to be judged. Look how we as a race threat our own planet. Hell we kill thousands of lifeforms just by breathing, we are basically death-machines.

I view earth like some kind of hardcore gym. You don't come here to be "pure", you come here to experience the harsh side of reality. Perhaps that's the reason why the bad guys exist? To teach us about this harsher side.

That's all just a theory, tho...