OK, the second reason for the "division line" is....

[CMHCoachNRef]

Originally Posted by BktBallRef

Actually, the throw-in ends when the ball is legally tipped. And that occurs if either team tips the ball.

Correct (post corrected). Which means that the "exception" (player jumping from the front court to the back court) ends as soon as the ball is tipped by a player.

But, if the ball is tipped and goes completely into the back court, the offensive player can legally retrieve the ball. Similarly, if a throw-in occurs under the attacking team's basket and the ball is tipped by the offense in the front court, they can go into the back court and legally retrieve the ball.

My point, here, remains that these situations have nothing to do with an offense stalling or not. If the objective is solely to create turnovers, then make all of these situations violations. As it is, the defense is actually rewarded for making a decent play (just getting a finger on the ball), while they are not rewarded for completely changing the direction of the ball into the back court. This seems to be an inconsistency.