Yes actually. financial transactions are often used as an example that demands strong consistency. But it’s not true in the real world for the most part. for any given money movement (a debit and a credit) there’s a good chance one of those legs is over the network - you’re either interacting with a third party api, or a proprietary internal product, or similar. So you can’t have transactional consistency, or fks. Further, for every movement there is layers of reconciliation that happens hours or days later, that fixes any inconsistency. Finance / fintech is actually among the most eventually consistent systems out there, so it’s sort of ironic its use in a lot of transactional examples.

Exception is true banking ledgers maintained at banks, but even then you’d be surprised. Entirely different systems handle loans and checking accounts