No, corrupted recovery refuses to be over written and I've tried every single conceivable way of doing it possible. Fastboot, adb, all-in-one-toolkit, nothing. Even tried flashing a TWRP downgrade but nothing sticks. I do have a stock recovery, it was the first thing I did.
And sure, I accept the difference between not booting and bricking but if your device isn't booting because it never will, it's a brick, although I do accept your point about not being able to completely brick through software. That was something I wasn't sure about.
Put simply, in the very very rare event of flashing a recovery that fails and then trying to flash a rom that fails because you assumed the recovery was fine, it's very difficult to recover.