Imagine shooting a rifle from a bench rest that consistently gets great groups. Then imagine if the sights were randomly changed every other shot without the shooter's knowledge. No matter how good his aiming ability, he wouldn't get very good groups.
Aiming and shooting a bow is a little like this. Our minds gain experience from every shot. However, if your form is different every shot, it's like changing the rifle's sights without the shooter knowing.
If you want to hit what you are aiming at, you have to first develop consistent form. If your form is not consistent, you are just confusing the magnificent aiming computer in your head.
You will learn accuracy much faster if a particular sight picture results in the same point of impact each and every time.
To do this you need to develop good form. What is good form? Good form means that the arrow flys with exactly the same trajectory every time.
Over the thousands of years that humans have been using bows, we've learned that there are specific techniques of form that work better for most archers in most situations. You don't have to use them. You can re-invent the wheel. You just have to be consistent. There are plenty of books and videos that cover these techniques.
Gap, instinctive, POA, split vision, etc. - it really doesn't matter as long as it works for you. And none of them will work if you're not getting consistent arrow trajectory through consistent form.
Hope this helps,
Allen