What Is the FDIC's Number One Priority?

My premise is banks should fail. We have nearly 5,000 banks in America and a healthy amount of failure is greater than zero. The question is when an institution fails, is that failure contained? Who bears the losses of it? And how quickly can this situation be resolved? I think the regulatory tools the FDIC and the Federal Reserve and other regulators have now are light years ahead of what they had in 2007 and 2008.