[John Graham]

For Horizontal Hinge Action (Ideal Compression), the Clubface is Open at Impact and Square only at Separation (1-L #17).

And, using approximate 'clock' terms, the Center of the Ball is at 7:00 at Impact and at 6:00 -- and precisely On Line -- at
Separation.

Study 2-C-1 (Linear Force -- The Ideal Application) and Sketches 2-C-1 #1, #2A & B and #3.

Let's assume that the face rotation is this much during contact with the ball (which is debateable) and the face at separation is directly at the target line but the clubhead path is still traveling downward, outward and forward at this point.

Face pointing at target at separation, club continues down plane with path to the right even if parallel.

This is not a straight shot unless mishit on the heel causing some gear effect which eliminates draw spin axis.

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The above image is of an inclined plane. There is only point on that plane that is more right than all the others. If that point points at the target and the ball impact is separated anytime before that point(while pointing at the target), the path of the club is going down, out and forward.

No straight shot.