Even so, if this "harmless form of HIV" does mutate back into the AIDS-causing variant and gives you the average 24 years to live after you've beat the cancer, you're cured of cancer but can't be intimate with your wife or husband or domesti^H^H^H^H^H^H^H^H^H^H (fuck political correctness, let's just say SO) without infecting them. Is it really worth the cure?
That is a drawback. If only there was some device, resembling a balloon, that could be placed over a man's penis during intercourse to help prevent the transmission of STDs.
Use the Force, Luke.