I just tell my self that the critters are not as scared of people due low population density and lack exposure to our apex predator status, what with our strong jaws, sharp finger nails, tough hairy hides, keen sense of smell and hearing, and superior speed and strength what's not to fear. 
So interesting, but if you read old Greco-Roman area/era reports of wild animals, which their military took excellent stock of, it depended wildly on season, number of people and normal animals in the area on how particularly aggressive wild animals were and how much they cared about the presence of humans as a deterrent. Modern reports show a significant decrease in generally willingness of animals to engage humans and their livestock, though this is also not universally true, and varies significantly in some areas of the world.
Though the lynxes in this game seem to be straight up suicidal insanity.