If you can launch the arrow on the same trajectory every time, you have a pretty good aiming computer between your ears that will send the arrow where you are focusing.
The hard part is getting your form to do the same thing on each and every shot. If you draw back to here on this shot, but there on the next shot, if your anchor is not the same, if the pressure point of your bow hand is different, if your fingers on the string are not exactly the same, it will alter the trajectory and confuse your computer.
Many people think that instinctive aiming is simply a subconscous gap aiming system. Maybe, maybe not. I don't think that it's all that important. As long as you can set up and execute your shot exactly the same every time, you will be able to hit what you want.
If you want to get really good at instinctive aiming, do most of your shooting on a blank bale and focus on one part of your form at a time. Mentally "see" if you are doing it both correctly AND the same on every shot.
The human brain is an amazing thing. It can accomplish great accuracy if you will simply train it and then get out of the way. An excellent book on this is "Free Throw" but Dr Tom Amberry. Nothing to do with archery, but lots of good stuff on the mental side of being accurate.
Hope this helps,
Allen