Many times, there's more than one option for pocketing the OB to get better position for running the table by getting proper angles so the easiest shot might not be the way to go for one ball in order to get to all balls.
Once you see the layout of the CB/OB to the desired pocket, focus is no longer on the pocket. It's only on the CB, the OB and the tip of the cue. The pocket doesn't have to be double checked, triple checked, or quadruple checked with alignment. But I also know that's not how many players see it, learned to see it, or are willing to change seeing it that way. Not that it doesn't work effectively, but just different and another way.