Either that or the average person is really, really dumb.
DefenderSD got it right.
Legalese is a language (what to speak of the concepts described) that very few people can learn. Even if they wanted to.
The system is too flawed, durasell, and I wonder that you don't see it that way. I personally know a couple or three people harassed by the law who shouldn't have been (one more or less forced to plead to manslaughter), and who knows how many actual fiends in human form are free to commit more atrocities.
It's a system run by scum lawyers who could give a s*** about truth, many judges run amok, and shysters of every description.
There's only one solution, and people won't go for it until things get way worse.
Public caning and public executions. Crime will drop like a stone. And the taxpayers will see relief, and a lot of government employees will be free to find honest work.
Here's a wise saying:
If you don't invite Reality in nicely, sooner or later Reality will kick your door in.