Let me break it down for you, your argument has nothing to do with the original post. Therefore, everything you are saying is pointless.You can be smug if you want, but I don't have to say so. The State Legislature said so when they passed the law.
OK State law is not exactly aligned with the Federal law anyway, as the federal statues (in at least some places in statute) states a pistol is designed with a short stock and to be fired with one hand; the ATF acknowledges the "one hand" design. The state law in the SDA references one or both hands.
That's why the state law goes on to define the word, and not rely on an ambiguous definition to be sourced from some other outside context. It sounds like it's splitting hair, but definitions are important in the interpretation and promulgation of law, which is why they bother providing them when such acts are passed.