You can get the button exchanged, but since each one is coupled with the secure enclave co-processor, touch ID doesn't work anymore. But home button still works, so does the phone encryption, you just can't identify yourself with the fingerprint anymore. If you go and try to add a fingerprint, it behaves like you have a muddy finger and can't scan it. But this ain't an issue since encryption is done by a PIN code first, then fingerprints are used as a more convenient way to unlock.
Frankly the device bricking is BS, since the encryption PIN code is still there and unknown to a possible attacker. You just can't use the victims fingerprints to unlock it anymore, or attach a hacked fingerprint reader, because it still won't be able to access the secure enclave to open and get the PIN code.
Frankly the device bricking is BS, since the encryption PIN code is still there and unknown to a possible attacker. You just can't use the victims fingerprints to unlock it anymore, or attach a hacked fingerprint reader, because it still won't be able to access the secure enclave to open and get the PIN code.