This teaching was invented by Rutherford. He was a lawyer. So OF COURSE he would explain a classic theological problem in legal terms, construing theodicy as involving a heavenly court case.
EXACTLY!!!
JWs have no systematic way they view theology. Instead they have a number of topics that are important to them and they interpret everything around those topics. There are many important things missed because of this, but those in the JW mindset usually will bluff over such things as unimportant.