> Nobody — neither a thief, nor a legitimate owner, nor the manufacturer can open them. The only option to reclaim the contents is to very slowly and with a great effort to cut them using serious industrial machines.

The analogy fails if there's no way of "cutting open" a gadget/cellphone/PC to regain control of it. The bank is perfectly capable of recovering the contents of the safe, even after a destructive failsafe, they just pay someone and wait a day.