"being drawn into a lifestyle which - statistically - is not good for them"

Fucking someone with HIV is not lifestyle, it's stupidity. The stats do show that HIV infection is high in the homosexual population, but more factors could be in play than just where one's pecker ends up. While there has been concerted effort to warn people about HIV and transmission methods and said virus, there has been little effort to go beyond token 'out-reach' programs to the homosexual communities scattered around the world. Some countries impose a death sentence for being homosexual.

People have never felt truly comfortable (please note that this is a broad brush I'm painting with) mixing with other people outside their belief system, 'ethnic' group, linguistic experience, sexual comfort zone, etc. However, attitudes that isolate people do not help address the problem, whatever that problem is. IMO, when it comes to disease it is a worldwide concern, just like nuclear, biological and chemical warfare weapons. Not a problem that belongs to any specific group(s) of people.