But the bank presumably knew your real age, address, and personal details? I was interpreting the bank to act as an age-verifier in some way rather than the mer

But the bank presumably knew your real age, address, and personal details? I was interpreting the bank to act as an age-verifier in some way rather than the mere possession of a card. Upon reflection there are privacy concerns that would make me leery of seeing this implemented in practice, but that has rarely stopped people before.