She can choose a random human and make them do it. She can.

He doesn't argue it. He's tired and it's pointless. He can't force Random to take it seriously.

'For me,' he says quietly. 'Just humour me, OK?'

He thinks that the difference with her is that she will actively seek him out, whereas the others are general threats to anyone who might conceivably piss them off. But he doesn't want to argue about it.