I am not trying to prove you wrong - and I believe this is an important discussion.
If you study anatomy, by looking at the front of the body, you do not see the spine movement. What you see is the front of the torso where the spine sits behind. For some of us, this is quite a distance - (if you know what I mean). Because of this, when you look at this picture, the spine has moved forward, no doubt however, it has moved forward because you have rotated the hips similar to rotating a ball where the back of the ball moves opposite to the front of it. When you move your belly button backward (backwing), the spine moves forward, when you move your belly button forward, the spine moves back.
You are correct to say that the spine has moved forward in the above picture however, you must look at impact and also look at the spine. If you do so, you will find that impact shows the actual spine returning to the position it was at address.
Tell me, how can the spine come back to its original position if it moved laterally? Are you saying that it had to move laterally backward (away from target) to get from downswing to impact? I think this is a very important discussion for those who are releasing early, or hitting behind the ball.