Yeah that's so much easier for Bob than using your carbon from a regular style credit card transaction, God knows there's no chance that due to the sweat on the glass, multiple times of picking up the glass, and whatever shine coating the dishwasher put on the glass to make it look nice there's no chance Bob would be completely unable to get a usable print and it would be so easy for him to figure out which of those prints he got is from the finger you actually use for your biometric identification.
Sorry, while the system isn't perfect it's much better than what we currently have.
One thing that I've always thought was funny and frankly a little nonsensical is the way that people feel so much differently about online purchases with credit cards than they do at department stores. In many cases with online purchases, the transaction is never seen by a human being, and in most cases, the entire transaction is encrypted from eyes that might be trying to "watch" the wire. Still, many people are much more hesitant to make online purchases for fear of someone stealing their credit card number, yet they'll hand that same credit card (and license if they ask for it) to a minimum wage employee at a restaurant or department store without even thinking about it.
People are strange.