"Isn't that life? You can try to be as responsible as you want but you can't control everything." She can't help but point out. The law didn't stop Goro and her from doing what they did, and didn't stop any of the Shadows they hunted. Ethics clearly had no bearing on Maruki in other realities, and even if Igor implemented any regulations there would be people that wouldn't listen. "At some point something will happen." He said there were multiple people wanting to do Ren harm, and Akechi's Shadow as well. He could stop and tell all of them to think before they acted and someone would break that agreement.