Earlier quoted context omitted.
In some parts of the world, rape victims are a frequent recipient of HIV. I imagine their assailants don't feel obligated to wear a condom. Please recall the regions of the world where these shots are going to be the least expensive, etc, per the article.
I think this is a great initiative for poor areas of the world like sub-Saharan Africa. In the first world there are other options available.
And the daily medication has all the downsides of daily medication. To compare to another daily medication, "The Pill" is only 93% effective because people forget to take it.