Yes Shinji. I think as evil as we perceive them, they are necessary. They live in all of us. Combinations of sins make up our desires, which we require to live. These embodiments of sins, that one sin is the only desire, the only personality trait they have. Taking it, now they have no reason to live. The fact that they can be stolen means they have hearts right? It means they share some semblance of humanity. They're people. Their heart might not be the same as a humans, but does that make their ego and their emotions any less human?
*subtly places my hand on my chest as I speak*