Simple physics – a round hard surface cue ball striking a round hard surface object ball or balls all of the same size diameter, regardless of the angle coming in to that ball, has an actual contact point between both balls as completely flat surfaces at that point, no larger than a pinhead, and is not possibly going to leave any type of scar on either ball.
Simple physics(calculus 2) states that contact point between two arcs stays the same no matter the curve of the arc. You’re wrong in your assumption. Simply put, unless the cue tip is actually harder than the cue ball, the half moon cracks aren’t caused by the tip itself.