As you pointed out previously, this is not true. They are required to make a reasonable effort to do so. It certainly can be argued that there was nothing reasonable Jussie could do, thus doing nothing would have been reasonable. Which is what he did. If he had been backing up much closer to the crease, or if he had been coming in facing the goalie, then yes, that would have been a penalty. But given he was backing up, well away from the crease, his inaction was a reasonable action, hence no penalty.