Yes, a little over 5,000 years ago someone walking through the Alps left the world of the living with an arrow in his side; but there’s no particular reason to treat Ötzi as a poster child for humanity in its original condition, other than, perhaps, Ötzi suiting Pinker’s argument. But if all we’re doing is cherry-picking, we could just as easily have chosen the much earlier burial known to archaeologists as Romito 2
Cherry picking these stories results in bad hypotheses. Sure you can use the guy with the arrow in his side to say humans were all violent, but you can also use the dwarf, that in spite of being unable to work or provide was well taken care of... now what? A whole different story emerges.
