As I said earlier, useful thread. Not sure who you regard as blinkered and closed minded, but if I hadn't believed you I wouldn't haven't done my own research into how your experience could reconcile with an article about M1 Macs being scrapped because they can't be accessed.
The answer appears to be FileVault and FMM/Activation lock, so I hope you will let us know whether these were set on your machine.
If they were then I really hope you will ask Apple as suggested.
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