Early man’s lifespan was about 35 years. If you got injured, you were done. No modern medicine, so each encounter meant blood loss, infection, or death. You can’t relate to this. Your lifespan is double that. Science and technology mean you can survive almost anything. It may be expensive to do so, but that’s still a significant improvement over death from an infected cut. But despite this safety net, your flinch is still there, in the back of your brain—still a goalie, but a goalie for things that are nowhere near as dangerous as they used to be.