Well it's entirely possible that HIV doesen't cause AIDS
You see, a scientist found that HIV was found in the lymph nodes of 60% of AIDS patients.
Plus there are people who have HIV but don't have aids (don't remember the exact statistic)
Since it's not 100%, that proves that HIV is NOT the sole cause of AIDS.
You know what might have been causing the aids outbreak among gays? The fact that certain gay people were taking certain drugs.