Compensating your aim for a personal sighting issue is a personal correction specific to you. CJ seems to be saying his technique is more generally applicable than that.Also, I believe, but am not certain, that CJ was not referring to stroking errors causing a bias of one side, but ball interaction phenomenon causing a bias. Whatever he was referring to, I think you can extend this concept to many parts of one's own game.
For example, I routinely hit balls too thick when they are near a rail, but almost never too thin. I don't know the cause. Maybe I'm seeing the pocket wrong, or my eyes play tricks on me, or my stroke veers off, or throw is more prevalent than I realize. But whatever the case, with this knowledge of usually making an error to the thick side, I could probably be much more successful in cutting balls near the rail, if I just aim for a thinner hit than I do now.
pj
chgo