That actually makes a lawyer a bigger con artist than a politician, sorry most politicians are lawyers aren't they.
So what makes a lawyer judge superior to the slave masters known as politicians.
The law isn't written as gobbly gook- it's written in a technical language, much like medical textbooks have their own language, accountants have their own set of terms etc. It can be a little dense, granted.
A judge needs to be proficient in a whole host of aspects of the law- evidence, procedure, substantive law. All judges have years of legal practice on top of their three years of legal education. A non-lawyer would be starting from scratch and would have to learn as he went. You think you've seen bad decisions from judges now? Imagine what it would be like if laymen sat on the bench and decided cases. Would you hire a layman to peform surgery on you, or a layman to design buildings?