What’s the added value of bank regulators who only concern themselves with the risks bankers already perceive?

Sir I refer to Martin Arnold´s “Foreign banks scramble to calculate potential losses if crisis deepens [in Ukraine]", March 3, just to remind you of the fact that these are the type of “unexpected losses” against which bank regulators, in excess of their quite low leverage ratio, do not require banks to have capital against.

In other words poor us, our banks are in hand of regulators who are primarily concerned with the risks we, or at least our bankers, should all be able to perceive. What’s the added value of that?