Ignorance is not yet a crime. If it ever becomes one, I will celebrate mostly the unintended consequences.
Until that happens, the issue is one of choice; if I am likely to interact with anyone with a communicable disease, I think an informed choice is my right. The patient's feeling good about himself can't trump that.
Your informed choice? An informed choice is only useful if the person processing the information has an ounce of understanding. Which people claiming they are going to get HIV from swimming with someone who has it, shows they clearly do not.
HIV is not jumping person to person through pool water, if it did frankly nearly every person thats ever entered a swimming pool or watering hole would be infected.
Fortunately HIV is not spread by such means, in fact its relatively difficult to contract HIV.
HIV is not TB, its not Ebola and its not Sars or the bird flu. Its a very difficult disease to spread, if it wasn’t and could be spread by casual contact or airborn or waterborn exposure, you and I likely would not be having this conversation because one or both of us would likely be dead.