I think you understand the situation quite well. The State of California does not want you to carry a firearm, period. The laws are designed to make it as difficult as possible for you to have a means to defend yourself. They are also designed to make criminals of people who have no intention to commit crimes in the first place, which is why we have the GFSZ. Anyone of sound reasoning knows that no such law will deter a true criminal from shooting up a school, but as was the case for Theseus, the law is very good at making honest, regular people into criminals.