For example, California switched over to a completely new set of jury instructions known as CALCRIM for criminal trials a few years ago, designed to eliminate a lot of unnecessary confusion and legalistic cruft which had accrued to the previous version, known as CALJIC. But even drafting those from scratch takes years. My reference copy of CALCRIM is about 2500 pages over 3 volumes. And that's just criminal - there's a lot more for civil trials. A LOT more.
Think of it like encountering Unix as a complete newbie. You know what computers are for and what they can do, but but actually learning unix at the command line is pretty complicated, no?
But a nice example would be this very case - even after the case was basically retro-actively thrown out, the prosecutor's office still maintain everything was kosher. (They still maintain that Collins is guilty - seriously, what the fuck?)
Be part of the problem, or propose part of the solution: that's on you, me, and everyone else who considers the matter. But consider whether you consider, whether you contribute; or whether you merely detract.