Well, there’s some good arguments there. But making something you want people to do illegal is certainly counterintuitive and doesn’t seem like a sane approach to me.

“The plight of the johns” is also just not a very moving cause because anyone who is worried about getting blackmailed even given all of these factors can just not buy sex.

Ah, so you do want to prohibit sex work. I get that’s not what you think you’re saying, but prostitutes can’t exist without johns. Abolishing sex work is a thing intelligent, well-meaning people argue for as well, but it’s a different conversation.