What you point out are policy differences as to why prostitution *should* be illegal while prostitution should not. But here the issue being dealt with is the First Amendment, obscenity precedent, and a CA Supreme Court ruling. There is no true legal distinction between the two, as my article argues, they essentially criminalize the very same conduct. The fact is that within the State of California just over twenty years ago a case dealt with someone that was convicted for pornography under a prostitution statute. The Court specifically was dealing with arguments based on the First Amendment of the Constitution. I think your points may fare well with a particular legislator, but they don’t quite translate well when dealing with a legal principle announced in something as fundamental as the Constitution’s right to freedom of speech.
You are right of course and I thought that I wrote that I didn’t actually address the legal issue.