When you create a character in a game, a story, or a piece of fictional content. Do they ever seem real to you? Do you ever regret putting them down? Or killing the others? I do. I can't kill NPCs even without wondering how the other NPCs would feel, their friends, family, the planets my character may destroy in RP. Even the villains, and the lives they end. NOW magnify this on a scale to where they actually DO feel those things.
Hermes himself says it, they feel it, they know what's coming. It's the equivalent of going out to murder your dog or your cat right now just because they showed aggression or didn't fit in. And I don't mean rabies which we do, because that' suffering for the animal itself. I mean if it scratched you, would you suddenly want to end its life peacefully?
Why is it different if you create it? These creatures had lives, Hermes saw that. Amaurot didn't care, only the best of the best or those that fit in THEIR view of the chain of life made it.
For example, the flea in our world would not have been around as it served no purpose they could see. In FF you even see this as the monsters you fight in the 98 dungeon, Hyth mentions he won't approve the concept you just fought. They had no regard for their creations unless their creations were up to par.
And even WE here on the forum are just as bad to an extent. All of this talk of "Well Meteion is just a familiar." "Flawed creation."
WE were mistaken as a familiar. Familiars can gain souls as Hermes said, Meteion could feel, she could reason, she was on her way to being a life just like ours. The only differences were her communication and she couldn't eat (because Hermes made it where she couldn't.) But like Hermes said, she would learn in reference to living and communicating. She may never eat, but she was very much the equivalent of us in life.
As were the other familiars. One of the Elpis NPCs goes on to say 'familiars are for a purpose' almost programmed, and then tries to assume yours. So then what of Argos? Supposedly just a familiar programmed for travel. YET you have to prove yourself to him, he has to accept you, he is loyal, these are not manifestations of being programmed to one task.
The reason we were mistaken as a familiar is because familiars is what the unsundered became. And if the unsundered are what were originally familiars with shards of ancient souls, then it shows that YES it was wrong to be destroying them.