Why? Do you think those qualified in finance would do (did) any better? It's all fugazi. It's a whazy. It's a woozie. It's fairy dust. You just gotta feed the geese to keep the blood flowing. Anybody can do it.
There are whole postgraduate courses on Financial Risk Management. Usually done by people with 2 degrees and a postgraduate qualification already. What you probably don't realise is that when you start talking about Investment Banking the Talent Pool is not a pool it's the Pacific Ocean. Ridiculously smart people come of out the woodwork to work there. That is why pilots are talking about doing trades or working in supermarkets, flying around the world in a jet doesn't get you very far in most industries without some sort of relevant qualification and experience.