1: Anyone who has been working for a while or doing the hobby for a lot has it.
2: Anyone who claims they are clean in that situation is either lying or doesn't know what they are talking about
3: Those who have it, most of them never had an outbreak and would never know, if they were tested, a big if, probably a false negative.
4: Condoms are only IIRC about 50% protective. With that, plus 20% of the population having it, it is pretty much impossible to not pick it up if you are busy enough.
5: If you do get it you will probably not get an outbreak and if you do, probably 1. It's often considered a social disease in that the social effects are much bigger than the physical effect.
6: If a provider did have Herpes, or AIDS, or Kuru, she will keep working and not tell you. Many kept working through the tightest of lockdowns during covid and were defended by others citing "survival sex work" If you think she will stop because of an STD she can hide, you are dreaming. If there is an active outbreak she might take some time off but otherwise, I wouldn't get on it.