That tends to be a rather widespead human character flaw. But yes, gays as a statistical matter, do have a higher incidence of self destructive habits. The issue is how that translates into public policy, that is fair, just, and reasonable, and respects core human "rights."
So it is a human right to engage in a public health hazard?
By that argument, smokers have human rights as well.
Instead, they are vilified. Whereas gays are elevated, enshrined and celebrated.
And I don't reach this position from a religious point of view. I really don't care what two people do on their own dime in their own bedroom.
But when they engage in high-risk behavior, then demand that such be treated as a right, and then shriek to high heaven that they not be allowed to donate blood and poison the rest of us, I have an issue with that level of gross hypocrisy.
And I'd think you would realize at that point that the critics of the gay culture have a point without being bigots.