There is one giant error in it all, that you keep ignoring.
It is not a question that “gay” men are more likley to engage in behavior risky to their health. For sure. Nor is it a question that “gay” men acquire HIV at a higher rate than others. Nor is it a question that persons with HIV have an shorter than average lifespan.
The error is how so many so-called “studies” attempt to attribute some identifiable shorter than average life span for “gay” men, and the conflate that same degree of a shorter life span to ALL “gay” men. Then, with those errors in hand the claim as “fact” an expectant lifespan for all “gay” men.
Conflating mortality for those with HIV to all “gay” men is an error. And there is no known, actuarially accepted, tally of deaths broken down as “gay” and “straight”, so their is no professional actuarially accepted average life span for all “gay” men.
THAT is not saying it is most likely lower than for straight men. It most likely is. All it says is that there is no reputable number for it. And when people try say a certain number representing a life span for all “gay” men is a fact, we know it is not a fact.
Didn’t read a word I said, did you?