Again, I’ve not said anything about morality. That prostitution is illegal in most of the US is just a fact, and I’m arguing this from how things currently stand.
But you said yourself that you don’t think prostitution should be illegal, so why would you have a problem with a prostitute using entrapment and charges of rape by deception as defenses?
Because it’s a misuse of the law. I’m in favor of changing/abolishing that law, not doing a misguided end-run around it, that doesn’t actually solve the problem.