If you could hit the cue ball correctly, assuming 'correctly' means hitting the cue ball the correct way to make the shot, then you don't need to aim.
That's the way I look at it. How do you aim a 30º back cut to the left with two tips of inside, two feet from the OB to the corner pocket and three feet between the CB and OB, using a medium-hard stroke?
You don't. You hit the CB correctly to make the shot, and if you did, the shot goes in.