This is not a good example. Most people in the United States were never in a position to get AIDS because they are not MSMs and not promiscuous. Most sex takes place between spouses.
Gay men still have much higher prevalences of promiscuity and unsafe sex practices than the population at large. Promiscuity and 'unsafe sex' was never an issue in the general population.
Moreover, as your study points out, 'switching' who is in what role in anal sex is another effective way of spreading AIDs. Women cannot be the penetrative partners in anal sex, so even if a woman contracts AIDS via anal sex, she cannot spread it as a penetrating partner.
But to directly contradict your false narrative. I'd point out that your study was done in 2007. That's 13 years ago. Gay male sexual behavior in 2007 greatly differed from that during the AIDs epidemic. By choosing to use an article from 2007 to explain away gay sexual behavior during the AIDs epidemic of the 1980s, it is clear that you are trying to spin a narrative instead of actually look at events. In the book "and the band played on" by Shilts, the number of partners recorded during the 80s among the minority of gay men who had AIDS was regularly in the hundreds. This is clearly more than most people -- gay or straight.
Like I said, AIDS is a disease that affected a relatively small amount of people who continued to live life as normal because they could not control themselves. This furthers my point that people are not necessarily willing to sacrifice life's pleasures due to a deadly disease
The AIDS epidemic peaked in 1995 in the USA at 40k deaths per year. People absolutely made permanent changes to their sex practices as a result of the disease such as safe sex, regular STD testing, and taking preventive medications (PREP). Because of transmission characteristics, the disease spread fastest among gay men and the epidemic created huge cultural changes in gay America. Until PREP was available, the idea of having unsafe sex was extremely looked down upon and seen as an unnecessary risk, even though many men find condoms less pleasurable.
So I'd say that's pretty direct evidence that people are willing to curtail or modify their recreation when it becomes risky.