I see the picture, but it doesn't make your point for typical builds. What you miss is that the spokes don't take a straight path to the rim. They meet and cross over each other inside over outside enroute. The difference in spoke length would only become an issue for radial wheels.

If you sketch an actual pair of spokes running from flange to rim, you'll see that the distance inside to outside equalizes somewhat if not completely. You'll also see that both spokes are longer than if they were straight (shortest line between two points). (Shimano/Campagnolo fudge factor)

In any case (for all non-radial wheels), when the spokes are tightened to the same height, any difference between pulling and forward spoke length is equalized by the hub turning a few degrees. If the flanges are mirrored, this would equalize any difference in pulling v. forward spokes.

This equalization by hub rotation is a trick we capitalized on in emergencies if the correct spokes weren't available. For example if I needed 296mm and didn't have I would build with 298 and 294, and both would end up the same height in the rim, as if by magic.

The problem here is you're looking at a bunch or trees, and I'm managing a forest.