I struggle with this question too. I became a vegetarian after learning about factory farms and how cruel these animals are treated. 99% of the animals consumed in the USA are from factory farms where the animals are basically tortured from the day they are born until the day they are killed. But if this is all fantasy why worry about it? Why have a moral compass at all? What does it serve?
I also wonder if there are two ends of enlightenment, one good and one evil. Do some of the worlds great "evil doers" come to realize that nothing matters and take the dark path (as most people would see it) while others who obtain enlightenment choose the light and teach etc..? Ya know "The force" the dark side and the light...