How do you figure that?
If a QB has completed his forward motion and begins to bring the ball back towards his body then there is no need to read minds - whether he intended to throw the ball or not is irrelevant because he didn't and he is bringing the ball towards his body.
If you like the tuck rule you like making a decision contrary to all evidence of what the player actually did - he didn;t throw the ball, still had possession of the ball, and was trying to bring the ball in for more protection - the exact opposite of passing the ball.