Are you willing to have your competition's last shot(s) missed on one or more stages at the national or world championships? Are you willing to bet your placement at any match on another posse's TO catching your competition's last shot(s) every time?
When I was fortunate enough to win gunfighter at EOT in 2010, the difference between first and third was about a second. If we'd had a rifle last stage that 2nd or 3rd place's TO had missed just a couple of shots it could easily have denied me the win. And I've seen categories won by hundredths of a second.