Oh indeed. PrEP meds are components of full HIV meds (although I understand that Discovy is often part of a two med regimen for HIV infection. But that is just the medcial front.
On the social front there is still a lot of discrimination to HIV individuals. One of the sad parts of our humanity (or lack thereof). And it is best to get one's whole life insurance policy contracted before infection as rates will be high otherwise (although there are plenty of HIV positive individuals living long and relatively healthy lives). And you're spot on about organ donation and blood donation. Even though the rules for blood donors have opened up; I still won't.
So I was not making a neg to poz comparison in my OP, but rather a PrEP vs HIV meds which have very similar side effects. And while PrEP is very good at preventing infection, it like vaccines is not perfect, just very very good.