It's very possible that if he had not been gaining leverage by pulling on the shorts, that he would have been choked out. It's no different than grabbing the cage to avoid a take down. There should be a point deduction, but a fine? Rediculous. A point should have been deducted as soon as the submission was released, but I figured Wiman didn't care, it's better than being finished right there.
If Wiman had been biting or eye poking or something then fine his ass, but grabbing shorts? Minor.