Honestly, at this point HAART treatments for HIV are giving folks a near natural lifespan, and the major threats to their health are becoming diseases of old age - cancer and the like. And the years they have are fully functional.
Compared to a chronic, wasting disease that will take years of opportunistic infections before you die, that's damned good.
Magic Johnson and Andrew Sullivan have had HIV for over 20 years and seem to be handling it fairly well. Certainly a harder life than most, but that's not stopping them from living a full life.
Its very common in a lot of of places in the world to ask for euthanasia in case of such diseases.