Here is what I have found:
If you get your arms, wrists, grip squared away, the dot will appear in the same spot every time you come up to ready.
This takes a LOT of practice. A LOT of dryfire/draw practice in the living room.
A couple of years ago when I got in to USPSA, I wanted a dot. Got one, and then realized I sucked and the dot did nothing to help my basic skills.
I went back to irons. All of 2018 I shot Production and some limited. This got my basic set of skills down as good as they can be.
I just picked up a Czechmate and guess what, that dot appears right where I can find it with minimal effort. My body position is instinctually "there".
The first two local matches, I came in 2nd and 3rd (pistols, overall) . Usually, I am in the middle of the pack. Actually, I was 1st in Open Div for both, shooting factory 9 minor.
As others have said, focus on the target and when the little red thing meets the A zone......trigger.