He's also financially literate enough to know that it's poor form release market-moving news right before the exchanges close a Friday. They could have waited an hour.
But "how money creation works" isn't the same thing as "how the financial system works". I guess the financial system mostly works over ACH.
We can see what happens when banks don't lend out deposits, because that's basically what caused SVB to fail. So by the contrapositive, they aren't really operating then.