Your message seems, at least to me, to be quite judgmental.
I'm interested in helping people who make bad choices and people who have bad luck. It's not clear to me that one group deserves more compassion than the other.
The comparison to cancers is a bit odd - HIV is generally not regarded as a lifestyle disease, while of course many cancers do have a lifestyle component.
HIV is communicable; the time and money spent to target specific populations in an effort to reduce incidence of a communicable disease of course pays dividends in that fewer people will subsequently be infected.
And looking further down the road (albeit perhaps with optimistic glasses), with enough effort, it may be possible to eradicate it without our ever having discovered a true cure. So it makes at least some sense to work in that direction, but those efforts of course have a high cost.