Really? Has any public health authority said "it no one's business whether you have unprotected sex with strangers"? On the contrary, there were and there are many campaigns to get people to have less risky behaviors.
Now contrast that approach with mandates and arresting store owners and closing businesses.
to claim otherwise is ludicrous.
Nonsense. From Arthur Ashe to Ryan White to Magic Johnson, there was continuous noise and encouragement around HIV prevention and research through the entire period. And narratives were manipulated then, too. Even into the early 90s, there was widespread public thought that HIV might be spread through saliva, even though the research was pretty clear it was spread almost exclusively via anal sex and intravenous drug use (and blood transfusions from an HIV+ donor).