I suspect that there could be a scenario in which it makes sense. Most of those Canadians residing abroad are doing it either because they work abroad or because they study abroad. I can't think of many students who, when they left Canada, were registered at the place where they study, and then, when they moved to study abroad, decided to bring their residence back to the residence of their parents.
Again, I leave it to the committee and Parliament to determine whether this is inappropriate in this day and age.
Similarly, when the spouse remains behind, if the spouse moves between elections, is it reasonable to allow the one who is working abroad to use the same address as his or her spouse or partner here in Canada? I leave that to the committee.