Your drive to the course is far and away the "riskiest" activity, with respect to your health, you will partake in during a round of golf. Second riskiest is probably cruising around in a golf cart during the round. Somewhere much lower on the list would be getting hit in the head with an errant shot or struck by lightning, and then even further down the list is the likelihood your life will be threatened by other golfers assaulting you. So if you're so concerned about surviving a round of golf that you feel the need to pack some heat, perhaps you'd be better off wearing a helmet during the round or walking to the course.
Also, if this question were presented in any other sport you'd get laughed off the board. I can only imagine how awesome softball arguments and hockey fights would be if participants were packin'.