Unrecoverable is relative. If I wipe out the bootloader on a phone its unrecoverable because I don't know how to flash it directly to the chip and I don't have a copy of the bootloader to even flash. Its a brick because I will never be able to use the device again. If I send it off to the factory in china they could certainly restore the device to working condition again but it would cost more than a new device if they even accept my one off job.

If a DRM system triggers on a car and I can't disable it its now bricked if the dealer won't come and fix it.