Well, he put a face to the virus, he was also close to the Reagans'. That being said, there was a real feeling it was "gay cancer" and/or punishment for being a moral sinner. Reagan was not going to lift a finger any sooner. If you continue other than Rock, I see no changes.
Now give Ryan White a sooner diagnosis, start the bombardment of hetro's can get this too.
But that is pretty much did happen in our OTL. People freaked out when you got blood, hetro sex. The best thing the Feds did was stay out of the way the FDA just basically Oh ok, done. The FDA cut years off the approval and boom AZT, the coctail.
As a disclaimer, I am in no way a medical professional. My Wife is a Doctor of Pharmacology and a Biology undergrad. In the past 20 years I have picked up here and there. She was always interested in HIV stuff since she rounded at Duke.
I guess to sum it up, Rock didn't do all that much. It was more when innocent people ( Ryan White) and they said oh PS it is a death sentence. People flipped out, all those ribbons. Big Pharm got real busy getting real busy, the FDA rolls over and boom so less deaths, people have to payback their insurance policies they borrowed against. Big Pharm gets that more wealthy.
My 2 cents. I really don't know what the current meds treatments are now. My wife is in the corporate world, she always put my vocation ahead of hers following me to Army basis.
One final thought. If there had never been an AIDS, I doubt that the LGBT COMMUNITY goes anywhere as close to the acceptance without HIV