Scientists say that the human brain( mind) never stops "thinking", altho you can get some arguments about some of the people walking this Earth. :rotf:
The mind cannot go " dead". However, if you concentrate not just on the front sight, but on an imagined Line down the Middle of the front sight, be it a post, or post and bead, or even a globe front sight, your concentration will carry you through the actually firing of the shot, including the sparking of the frizzen, and the ignition of the flash powder in the pan. Giving your mind something to do you WANT it to do, and that aids you in hitting you target, is preferable to trying to do something the brain can't do.
I ask students if they are seeing the PRB coming out of the muzzle in front of their front sight, and/or seeing flame and smoke there just before the gun recoils? If they can see those things, they are not only sighting the gun properly, but they are also doing the first parts of the "follow through" correctly, too. If you can see the PRB leave the muzzle, you should be able to "call" the shot, ie. tell where your sights were aligned on the target at the instant that the shot left the barrel.
NO ONE holds perfect 10-Xs every shot, all the time. Sometimes a shooter puts them altogether at a match and shoots a "possible"(perfect) score. But, no one does it all the time.