Except for that part where people did go to jail[1], it's just that they were all from smaller institutions rather than any of the top executives from national banks. That is certainly a problem, but it does illustrate that if you (like most of us) are a nobody, you're not necessarily gonna get away with anything.
[1] http://money.cnn.com/2016/04/28/news/companies/bankers-priso...