Pretty sure you were referencing me in your opening quote. Let me explain why I said that.
The risk of getting something for a barebacking WG is higher - by this I mean this; if a girl sleeps a guy without protection, there is a risk of getting something transmitted. Now, if a girl sleeps with 20 guys a week without protection, that risk is 20 times higher than a girl that sleeps with only 1 guy a week. You have to speculate to accumulate.
As for the second part, about offering bareback if you already have aids or whatever. The only way I can understand the mindset of a hooker that offers bareback to everyone she meets, and not be worried about aids/hiv/sti's is that she must already have one/all. No rational person would have unprotected sex with total strangers, multiple times a day/multiple days a week, and not worry about their own health, unless they knew their own health was fucked already. That's the only logical explanation I can think of. If you did worry about your health, you wouldn't offer BB to every punter you meet! And since there's no logical explanation, in my mind, as to why you wouldn't care about your won health, the only explanation must be your health is already gone and void.
So would I go and see a WG that offers BB and have sex with her? No thanks, not even with protection.