You don't have to render anyone unconscious or take them to hotel
"I can imagine the situation in which a fraudster meets someone in a bar..."
... and says "Hi, didn't we meet at blahblah last year," buys them a drink, and gets their fingerprints off the glass. And then uses it not just for accessing bank accounts, but for identity theft in general, since more and more organisations are relying on biometrics like fingerprints these days.
The problem then becomes obvious: biometrics can't be changed like stolen cards and tax file numbers. So once someone has your fingerprints, retina scans, voiceprint, whatever, and is using them to commit criminal acts, you're fucked for the rest of your life.