Ok, now I'm confused.
Who said anything about a player trying to duplicate the movements?
I'm just comparing the hard coded values (in attract mode) to an actual player's inputs (using a save state, for example).
A human player could load a save state 100 times, attempting to play the board identically each time. The odds of performing the same exact actions, frame by frame, for any 2 trials, are close to zero. The resulting gameplay would vary greatly.
By contrast, the attract mode (initial run) should produce identical results, since the input values
are precise.