Before PrEP having sex without a condom was an act of madness only similar to playing Russian roulette.
PrEP has certainly changed things, I've always assume there would be a vaccine or a cure but I guess treating folks who have it and those who don't want to catch is more profitable.
Agreed about what you say on escorts from other parts of the world. I know an escort from Uruguay who used to get tested at Whitman Walker Arlington VA. Every time the conversation was in Spanish: "do the right thing", "don't ever trust anybody", "be responsible", "wear a condom" but in English it had a different tone "no big deal if you're positive", "now it's like having diabetes", etc.