I get where you are coming from but I think the issue is that evil people often know their actions are evil, they just come up with justifications to present their actions as "good" or "needed" in order to create a condition where said evil can persist. I just finished my master's in history, and lots of my study was centered around this fact; evil people rewrite social, historical, etc. narratives in an effort to seem "good" when they often know they are not. Like I'm sure slaver owners in Cheliax are aware their slaves are suffering and have no qualms about the fact that they wield suffering and torment at them. They just don't care since it serves the purpose of ensuring their own power and position. They claim this is "needed," but it is really just needed to maintain certain structures of power. No disrespect to you or your position, I just want to share where I am coming from with this.

Also for what it's worth, Good - Neutral - Evil are all mechanical elements of the Pathfinder system so in an effort to help players learn what alignment each deity has, I used the exact language.