I don't think Ryan White proves your case. As far as we know he was properly nurished, didn't have chemo, nor take recreational drugs. He was HIV positive and died from AIDS (though I do not know what ailment actually killed him.)
Ryan White was a hemophiliac and years of put foreign proteins into his blood can crash his immune system.
The most damning argument against your claims is that I have failed to see where AIDS has been produced from "poppers" and other drugs in lab specimins. If this were the case, it would be a tremendous discovery and the word would be out on the street. Bath houses would reopen (sans poppers) and anonymous orgies would once again rule the gay world. Condoms would fall by the wayside. Yet, this hasn't happened! Is this another FDA/CDC conspiracy to side with drug corporations?
It's my understanding that poppers are an integral part of the promiscous sex scene (esp. gay sex). It's also my understanding that homosexual men are the chief users of poppers in terms of quanity. Certainly heteros and lesbians if users tend to use the substance with alot less frequency. If they did than this population would be an excellent test to see if poppers do cause AIDS.
The other problem I have always had is that AZT has a laundry list of side effects many which end up in death. So your mortality rates for patients using the drugs would be high. Then when protease inhibitors arrive more people live longer, but these drugs are less dangerous than AZT (even though they are still pretty bad themselves in terms of side effects). So now we have people living longer so the new drugs appear better.
It's been a while since I did any medline searches on this stuff. But to my knowledge no double blind studies have been done on the current protocols for AIDS. Only randomized trials against previous treatment protocols. So once AZT was established all you have to do is beat AZT. You never have to go back and see if you're better than placebo.