I believe my post is all the more valid when you don't have to worry about swerve. Like you said, on the break all you are concerned with is squirt. That being the case, your pivot point could possibly come into play.
Let's say you are breaking and you are aiming for a full hit on the one ball. Let's also assume you are bridging exactly at your cue's pivot point. Lastly, let's assume due to the nature of the break shot, you aren't concerned with cue ball swerve. Now say that you miss hit the cue ball just slightly. You now effectively have a different shot line, that being a slightly off center hit on the one ball. However, due to bridging at the pivot point, this new shot line is offset by the cue ball squirt and you still get a full hit on the one ball.
This is my understanding of a cue's pivot point. What am I missing?
You are quite correct with your explanation, in theory.
My only concern would be that I believe the pivot point is not exactly the same at all speeds, so this method would require the breaker to maintain a very accurate break speed.