In BR perhaps but in F-class there is plenty of opportunity to have the rifle bumped a little and be on the adjacent target at 1000yds and not notice it if the optics FOV/travel of the fine front rest adjustment makes it hard to see the target number board. In F-TR it is even easier to move off target and have that occur during times other than recoil of the rifle. Having the ability to dial back the magnification to make the top/bottom of my number board is invaluable as one crossfire at a big event and your going to have a bad week.
Sounds like operator error even with a sling and irons you stay on the target, unless you line up on the wrong one. LOL... Maybe the rest is problem..... jim