When you swing a golf club well you do so without any conscious thoughts. Or in other words you swing the club automatically using your Foot Valve subconscious mind. The better and more consistent your setup the more you'll be able to swing automatically. And to back me up on this read this quote from Tiger Woods:

"Poor ball position is a silent killer. If you don't place the ball precisely in relation to your stance, the ball will be playing you instead of you playing the ball. You'll have to conjure up some type of weird swing movement just to get the club on the ball, and because of that you'll never be consistent."

Tiger Woods

So one huge determining factor as to whether or not you become a consistent ball striker will be where you position the ball in your stance and how consistently you get the ball positioned where it needs to be for each club. If you position the ball poorly in your stance then you'll need to make a lot of compensations as you swing and this will mean you'll greatly lack consistency.

So here's where you need to position the ball in your stance to become a consistent ball striker.