This would still be destruction of evidence - virtually your only defense against that would be if it was not triggered by you.
(Common sense tells me that the accusation might make sense both in cases in which the accused knows about a crime and in cases in which the accused knows about a police investigation, even in the absence of a crime, but deleting nude photographs to stop a customs officer from seeing them, for a random example, would that be a crime?)
"You dumbass! You use my thumb to trigger duress mode! Don't you know thumb is always wipe, and PIN is always unlock? Moron!"