This is a very 'tech' response in a good way, it made me smile. I think they meant why would a bank give an anybody a loan? You have no way of knowing if an anybody already has a loan out with you and you have no ability to evaluate their risk. Why would you loan money to someone with no ability to review their credit health and financial situation? It's an impossible battle without inventing a user specific metric.
How do you price your current income with no identifying information is the point that was being made. If you can prove your income then you have identifiers.
you get a standardized form from your employer, or income transactions from the bank. They can use that data internally, but they cannot sell it nor give it to 3rd parties.
