The writer seems to have a US bias, not recognizing the prevalence of HIV in South Africa. Depending on the study, in South Africa, approximately 1 out of 6 or 1 out of 20 children have HIV, 1 out of 3 or 1 out of 11 20-24 year olds do, and 1 out of 3 or 1 out of 6 age 25-30 do.
I'd say for a South African resident, with HIV prevalence rates that high, this is a very valid issue that needs to be addressed, especially since there are a significant number of children who are carriers, primarily through being children of HIV carriers. Even going with the 1 out of the 20 figure (and assuming that children don't know anyone in the 20-30 age bracket) the odds of them being around someone who's HIV positive is rather likely, and awareness of the issue is a necessity.
Now, for the US-centric view, she's probably right, we can afford to shelter our children as the issue isn't one they have to face, but that doesn't necessarily mean it's right.