Creating Black Swans?

We absolutely do want to have banks be able to survive a recession that pushes unemployment up to 10%. The unemployment rate hit 10% in 1982 and again in 2009 (albeit from a higher base than today.) In the early 1930s, it rose from 3% to 25%. After what happened in 2008, how can anyone seriously claim that we don't want our banking system to be able to survive a recession that leads to 10% unemployment? That makes no sense.