I probably could write something, but HIV is an epidemiologist's game at this point, and I honestly think the epidemiologists want to say HIV can't transmit in ways that the Hepatitis B virus, a DNA virus, has clearly been demonstrated to transmit. If you press a virologist in private I'm not sure they'll stick to "can't", especially after the COVID-19 virus mutation rate fiasco, and, though not a virus, the prion situation.

I think "can't" deserves at least something physically (as in physics) unlikely, not something that's been demonstrated in a DNA virus previously (and like I said, HIV in provirus form is not unlike a DNA virus).