Arendt is one of the more overrated authors in America short of the founders, but she has a point about how, when you are removed from the brutal nature of the violence, you can just sort of shuffle it into your day-to-day activities. Sure, you can certify the paperwork, it's just letters on a screen. Hell, you can even administer the needle, as it's not your job to concern yourself with his innocence or guilt, it's your job to use this specific set of injections to kill him in a visually benign way. Separating arbiters from brutalizing and brutalizers from arbitration makes the flagrant injustice much more palatable to both parties.