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Just my 2 cents, but I thought the reason Homer drew 2-C-1 #3 that way was to illustrate that both the angle of approach and the arc of approach methods of delivery will give a straight-away golf shot.
In ideal compression, the ball will not leave the clubface instantaneously, but after the ball has reshaped. Then the internal forces causes the ball to propel along the line of compression. (2-A)
The diagram illustrates why we have to hit the inside-quadrant to get a straight shot. The distance in the arc is the distance the clubhead will travel during the time the ball deforms and reforms. (In reality, that distance isn't very long, just exaggerated in the diagram to give room to see everything.)
BTW, have to check my physics books, but the circular motion of an object gives it a tangental and radial force. The combination is why an object will go in a circle and not either drive into the center or fly off in a tangent. When the circular force hits an independent object, the force calculation on the ball would be (the mass of the clubhead) X (tangential acceleration)
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