What is a Chief risk officer?
CROs report to the board and the CEO on various issues, including insurance, IT security, financial audits, internal audits, global business variables, fraud prevention, and other internal corporate matters.
That's all cost-center stuff, none of that has anything to do with the banking line of business. It doesn't need to be chief anything and it had nothing to do with the failure of SVB.
A bank's entire business and reason for existence is risk pooling and risk arbitrage, making money on the interest rate spreads between being on different sides of different products. The CEO of a bank cannot afford not to be qualified to be the head of banking risk. He should have quants working for him and reporting to him, but the buck stops with him.
Responsibility works best in a hierarchy, you're in charge of something, you report to somebody who is in charge of you and what you do, but at a minimum, the CEO needs to know the core business cold, and sideline delegate only things that are not of that nature. A bank needs that job description up above, but it's not C suite. Having a C-suite encourages egotism and distributes risk (not interest rate risk) in an un-responsible way, if you have a chief of something, why it must be taken care of, right? There's only room for one chief. In addition to that, COO, CFO, CMO have pretty standard meanings, but no reason they can't be called VP of Operations, Treasurer/Controller/VP of Finance, and VP of Marketing though.
And then, no need for a CEO, just have a President. (that corporations have a president is encoded in law, btw, but not CEO)