How about the analogy of robbing a bank vault versus robbing safe deposit boxes? If half the money is stolen from the bank vault, everyone at the bank has lost

How about the analogy of robbing a bank vault versus robbing safe deposit boxes? If half the money is stolen from the bank vault, everyone at the bank has lost half their money (ignoring insurance, etc). If the contents of half the safe deposit boxes are stolen, you don't distribute the remaining safe deposit boxes among all the customers; half lost everything and half lost nothing.