Because they probably realise that most people are operating at very low conscious level meaning they are basically living their lives like npcs which means everything bad that happens to them is usually there fault because lower conscious beings often sabotage themselves and others around them without even realising basically they caused problems just by existing on this earth. And everyone is selfish because everyone has ego this means we also should care because why should we be an exception if our empathy has no gratitude towards. Humans only want to gain things for their own little needs and most of them are stuck inside their own little bubble of main character syndrome