In fairness, an adversarial challenge can be useful in pointing out weaknesses (and possible mitigations) to a particular technical approach.

It's not clear that all of those objections are substantive or insurmountable.

"The USB port may have died" might be one possible response. (Not technically a lie, and hence defensible in court.) Or just silence.

Alternatively, some way of directing such probes to the decoy partition and presenting a sufficiently coherent impression of a valid partition might be another approach.

Much of this comes down to risks presented and costs of mitigation (or of getting mitigations wrong).