Despite her indignant feelings towards the actions towards the trio, she is in no position to rebuke or tell them to stop. Every life is equally important, but in this world those who survived the turmoil of life are the winners. Sad it sounds, but even as a goddess, Leila really cannot stop them from wreaking havoc.
If things really follow her own designs, there will be fewer wars and widespread sadness. Unfortunately, humans are born to be stubborn and dauntless creatures. Once their rebellious bones are poke, they can dare to challenge the sky. Therefore leaving them alone is the best thing to do in her position.
All she can do is to widen the span of her wings and give shelter to those whom she cares about.
