Having some kind of hidden “I know what I’m doing” mode would make sense, but would probably defeated the same way as “I’ll teach you how to open browser console” to paste some command exploits.
Both of those things existed in the early 2000s, but if the risk of a loan can (appear to) be shifted onto someone else, banks can and will issue bigger and riskier loans to people, and will reward the individual people selling the loans personally.