Well, none of my ancestors traveled halfway around the world so that they could pretend that they felt threatened by a "predator." When you're wondering why so many people think this kind of thing is weird, you're not getting the gratuitous part of it. To normal people, it seems gratuitous, pointless.
For some reason, this guy seems to have a need to try to trick other people into thinking that he engages in acts requiring personal courage when he's really just a pathetic fraud. How does someone get that screwed up in a dental office?
You impute a great deal to this fellow with no evidence.
From Gilgamesh and Beowulf to The Terminator or Predator, there is plenty evidence this behavior has been bred into Man.