I’m sure it’s very rare (now) but wait until the price is at 1M. And almost certainly they have duress protocols.
But the biggest win from it would be as a deterrent. It would make it seem like virtually everyone had a third-party multi-sig setup at the ready, and there’s no point in even trying.
I suppose though it could have the opposite incentive wherein attackers got wind of it and just figured everyone was lying even if you really did have it!
So some poor bastard has the setup and gets tortured because the attacker assumes he’s faking it!
But the gist is to make it so no one really knows if they can ever get anything out of a violent attack.