Songwriting is a craft. Writing good songs on a a consistent basis doesn not happen spontaneously. In fact, most of our best songwriters learned to write good songs by writing a lot of not so good ones. Education matters in songwriting, just as it matters for physicists, chemists, doctors, lawyers and MBAs. Education lays the foundataion on which to build experience.
To model correctly one tranche of one CDO took about three hours on one of the fastest computers in the United States. There is no chance that pretty much anybody understood what they were doing with these securities. Creating things that you don't understand is really not a good idea no matter who owns it.