It's about preventing mistakes and everybody makes those. If your company or institution is a target for spies, you want to avoid anything that makes it easy for an attacker.
I'd like you to give me all your kitchen knives. If you need to cook a steak or something, you can just give me a call and I will supervise you while you use the knife.
I wouldn't want you to make a mistake and make it too easy to injure yourself.