If your subconscious is flawed it won't matter how hard you try. Shot execution is always more important than the result. By flawed I mean inability to hold at draw long enough for your subconscious to get everything lined up. A poor release, or other form abnormality. Think about it, a split second is not enough time for your subconscious to process the sight picture, and get you lined up.
Most put the cart in front the horse so to speak. If you can't execute a proper shot, it doesn't matter how hard you focus or concentrate, or aim. Make time to build a solid foundation, and re-align your subconscious with blank bale practice.
I know the discussion is centered around shooting live animals, but it should be viewed as just another well executed shot, regardless of the target. Slow down and breathe, help yourself take control from start to finish. I think people need to be in absolute control over their shot sequences.
Everyone here knows where the arrow needs to go, even if there is no obvious feature to stare at. It's like those black boar targets at 3D shoots that are placed in the shade on purpose. Just because you can't see it, doesn't mean you don't know where its supposed to go.