You know, at the end of the story this really makes no sense at all. The tolerances that are allowed are so small, and the checks so non existent that all it would take to get away with breaking the rules is a good finish job. Apparently Soe was singled out only because the one-panel-2-cm-change showed, and attracted somebody's attention. "Cheat" with care and you would be off the hook, because apparently the PWA does not have the resources to check sails; or boards; or foils.
It is hard to see how this situation makes for fair racing, and it did succeed in messing up a ground braking event.
Your arguments make no sense at all.