From what I've heard, The better anti-HIV drugs we have these days actually decrease your viral load so much that you can not infect other people. (Please correct me, if I am wrong.)

From the perspective of your theory, that would seem counterproductive. As a greedy pharma company you'd want people to take a drug that makes them feel good while they are on it, be no permanent cure, _and_ still allow them to spread the condition.