"Who cares if it's unhealthty for them? Everyone is free to live his life as he chooses, and he must bear the (possible) consequences of this action."
I believe his point was simply that they declare it is healthy, and quite simply, it is not.
You ignore the fact that sodomy is a good way to spread disease. We're not just talking about an individualism that emphasizes living as one sees fit; we're talking about actions that benefit or do not benefit the larger community. Community sentiment is basically absent in radical individualism. It's basically a very selfish mentality. I'm guessing that it has something to do with the fact that most of us no longer live in tight-knit communities or villages and the like.
For starters society bears the consequences -I would guess most people do not like the idea of a potentially tainted blood supply and consider such a safety concern, do not like to publicly fund the delusion and propaganda campaign comprising homosexual safe sex training (aka "AIDS" education <---MEGA BARF!), do not like funding further development of such novelties as a "better" rectal microbicide, and the list goes on and on and on...