We had a DEA guy through here with Don Carroway a while back. He had been in several gunfights with his issued Sig and red dot. He said only through Grace was he still alive. After the third engagement and still not being successful he realized he was Searching for the Dot. After he went to Irons he was successful in his next shootout. This could be because he wasn't putting in the time Or he was reverting to 10 million years of hard wiring. We all understand and all practice for "front sight" or red dot or laser sighting, but when that saber tooth tiger attacks inside 10 yards....you gonna be looking at Him. All of you that mentioned "presentation and dry fire" are dead on the money.
@Stick Man shot here enough that he left his dots. He has other reasons also but the Wizard convinced him.