If it ain't broke, don't fix it....
But, why let that stop you? The thing that occurs to me is that you may not be coming to full draw. Imagine yourself pointing your bow arm at the target, and drawing the bow back to maybe 3/4 draw. At this point, if your drawing forearm and your arrow are lined up, your arrow will be pointing to the left of the target (for a RH shooter). If you release the arrow at this point, assuming you do everything correctly, your arrow will impact to the left of your mark.
If instead, you continue your draw, your drawing elbow will move in an arc around toward your back, and your drawing forearm and arrow will rotate into alignment with the target.
Now if you consistently release the arrow at 3/4 or 7/8 or 15/16th draw, and get tired of hitting to the left, you can "correct" this problem by closing your stance, so that the arrow is pointing at the target when you stop your draw at some point prior to reaching full draw.
You can test yourself on this by looking at the arrow when you feel like you are at full draw, and then continuing to increase back tension without releasing the arrow. If you weren't really at full draw, you should be able to see the arrow continue to rotate clockwise as you increase back tension, so the point of impact would move to the right. If you really were at full draw, then further increases in back tension would not result in any noticeable change in the alignment of the arrow.
Another possibility is that you are letting your shoulders open up during the draw, and by closing your stance, you are bringing them back into alignment with the target. You can test this by having someone put an arrow across your shoulder blades when you are at full draw. The arrow should point at your target, not to the left.
I suppose it is possible that you could be doing one or both of these things, and like it better than if you shot with "good" form, so long as you are able to be consistent. However, since good form has worked out so well for so many people, you probably owe it to yourself to learn to shoot with good form before you begin tweaking things.