I agree with you that we likely won't see this feature used much in the real world. I always tell Firefox to deny knowing which device model I have if asked. None of your damn business.

For personal accounts at least my experience was that a very large transfer (hundreds of thousands of dollars in a single transaction) required talking to two random employees. The first was a random call center worker who answered my call & the second was randomly chosen by the bank to run the whole process with me again to confirm. The web UI was clear that I would not be able to perform my transaction without talking to a human. Using two at random defuses the risk of internal collusion to defraud a customer. But I did use my good bank, maybe a mediocre bank would accept something a bit less stringent.