Personal choices and/or wiring about sexual attraction, and with whom to share one's life, I don't think is in the same "class" as substance "abuse." JMO, but I think it is a widely shared one these days - - very widely shared.
Why? Some people are pre-disposed towards addiction.
People who eat trans fats are only making themselves sick.
But gays, despite two decades of AIDS education, still spread the disease because they cannot control themselves to be either monogamous or in control of their impulses. Google gay meth abuse and get back to us as to the public health problems too many gays cause.