Plenty of things can be simplified for non professionals, but the nuance of certain topics is then often lost. A single word in a written law can matter a lot.
No disrespect to anyone, but can an average career teacher understand the nuances of securities law? Can (s)he understand the actual difference between tax avoidance and tax evasion? Some can, absolutely. Others definitely can't and are operating way out of their league.
Lawyers and prosecutors are great at creating stories, but isn't what matters or not whether the law has been broken?
As an example; I had a tax issue (different interpretation of a certain law) but retained an amazing tax lawyer. He was _great_. The way they juggle the story around without lying, yet drawing the line very close, is amazing. Based on personal experience, I just don't think it can work without subject experts.
Amazing charismatic lawyers (or prosecutors) will be able to bend an outcome, and that is just not right.