Humanure is safer if it's been fully composted.

The reason not to grow vegetables in human poop is because of the human pathogens...specifically bacteria and viruses, and parasites. Bacteria is less of a problem. Composted means that the bacteria and viruses have been eliminated by time and the activity of soil microbes.

It's safer to use humanure on fruit trees because fruit are a kind of descendant of the original plant, and as such it grows differently. Kind of like in human fetuses there develops its own blood supply and chemical profile from the mother within the amniotic sac. The fruit of the plant will get fewer if any human pathogens from the mother plant.

vegetables however (veg being 'you eat parts of or the entire plant') are dangerous to grow in humanure