I don't see why you are arguing with me here. How is my argument affected by these claims?

Let me try putting it in a way that is (hopefully) freer from legal nitpicking: It's possible to create a system where consenting adults can engage in whatever consensual activities they wish, even when (gasp) money changes hands between them, and still not legalize objectively evil behavior like slavery, negligent homicide, etc. Further, I'd argue we don't even to make new laws to do it, though this part seems to be surprisingly controversial.