Move that visual picture 1/2 diamond down table and the lines do not change and neither does the bisecting line between them.
Move that visual picture 1/2 diamond up table and the lines do not change and neither does the bisecting line between them.
Looking from a lower or higher angle from the bisecting line does not change the visual perception of the horizontal alignment of those lines nor the visual perception of the horizontal alignment of the balls.
Do Mr. Shuffett's prescribed procedure "objectively" & the outcome angle for all 3 of those shots is the same. If the one pictured pockets, then the other 2 do not... given that the prescribed procedure is done "objectively" with no subjective interpretation nor input nor any subjective change in the size of the 1/2 tip offset pivot to center nor the supposedly = visual sweep to center cue ball.
The same = the same. Only different = different.
What I have said here is consistent with science.
Now, blow that pic up until only the balls are seen and no pocket nor rail is visible in the picture. That is only what is supposed to be required once the visual & pivot direction has been subjectively chosen based on experience. Do the procedure & the OB exists on the same angle each time for each shot.
Once that blow up is done & a pic of such is shown to someone, they would not know which of the 3 shots they are looking at a picture of. Tel the the visual & pivot direction & if done objectively they would produce the same outcome angle.