Per 1-L-5: "The clubshaft lies full length on a flat tilted plane."
Per 1-L-6: "The clubshaft always points at the plane line except when they are parallel to one another."
Most tour players strike the ball better than the rest of the golfing population, yet their finish does not reflect the above nor the finish depicted by Diane in 8-12.
However, I have seen Sam Snead hit shots with a finish in 8-12.