I'm also not characterizing his illness. This isn't a moral issue, it's a medical one. It's also an unfortunate, but significant, public service opportunity if he is having HIV medical issues.
The "so what?" will resonate if he does die of "complications resulting." The guy is, like it or not, a cautionary tale. He's also a pop icon with a considerable following all around the world, and therefore, he has--even in death--the opportunity to greatly influence behavior.
He engaged in risky conduct, for which he was arrested more than once, and, as they say, actions do have consequences. If he were willing to encourage people to exercise caution he'd have nearly as much resonance as Yul Brynner doing the "Don't Smoke" ads (unfortunately, Yul died of lung cancer shortly thereafter and only recorded his ad for posthumous dissemination, but you get the idea:
http://www.youtube.com/watch?v=JNjunlWUJJI ).
I'd rather see him live to do the PSA myself; I think he's not done yet, even though he's on the far side of his career in the big picture. However, that will depend on first, the accuracy of the report in the first place, and second, his (or his publicists') willingness to get out in front of this (admittedly still speculative) medical issue and do a bit of public service/educational intervention.
I hope you are, and stay, healthy. HIV/AIDS is simply a chronic condition for many, but not all. I can't help but believe that there will be a cure for it soon, but in the meantime, reduction in transmission is the way to go.