I think you misunderstood my ideas a lot. As usual there are 2 parts. There is the ideal part and there is a damage reduction compromise. For the former I am all in. For the latter, just come up with better idea than mine then, anything that works.
I do not advocate government intervention at all in sex and reproduction. Every sex and reproductive acts between consenting adult should be legal whether it’s commercialized or not. Marriage should not get any favorable treatment compared to prostitution and it’s not up to government to decide which one is which.