Jump stop vs "up and down"

[docofficial]

Now I am confused.

Here's the play again, in my mind, in simpliest terms. In a perfectly legal jumpstop, the player ends the dribble by catching the ball with one foot on the floor, and then jumping off that foot and landing simultaneously on both feet (neither of which can now be a pivot foot). Right. But that sequence of moves (ending dribble by catching the ball with one foot on the floor) happens all the time when players jump for a shot. So it occurs to me that, regardless of what the arms, hands, and ball are doing, the feet are doing the exact same thing when players perform a legal jumpstop and when players jump for a try. Thus it does not matter if they release the ball while airborne or not, as long as the return to the floor with both feet at same time.