Set up a simple straight in shot from 3 feet away. Walk away and come back in one week. That same shot will be there barring a natural disaster.
The pockets never move, the OB can't move unless it's hit by the CB, and the CB can't move unless it's hit by the tip of the stick.......by a human holding hit with their grip hand and swinging it forward.
And that tip/CB contact is what determines the outcome of the shot. Sooo, some will say the CB is the target......that little 3mm area that you need to hit with the end of an accelerating tapered piece of wood, that is pointed in the right direction and angled correctly. PSR, initial alignment and staying rock steady while down is very important if you're a CB last guy.......that's another story.
I ran 219 balls playing straight pool looking at the CB last on every shot.
I believe Ralf Souquet looks at the CB last.