For anyone who shares accommodation and housing—particularly the groups I highlighted—and doesn't have their name on a utility bill or on the lease and doesn't hold a driver's licence, it's difficult to confirm their identity and place of residence. The rules are very narrow. Even with vouching, conceivably, if a poll has 250 electors, the person across the street from you, who is your neighbour and could vouch for you, truly cannot vouch for you because they're not in the same polling station.
The voter information card is one piece of identification. You need two pieces, right? In some of the ways that people were looking at fraud, it was that those could be used fraudulently, but you also need another piece of ID, and that really gives Elections Canada the assurance that the person who is coming forward with that identification card is who they say they are. With students moving quite a bit, their parents' place might be their place of residence where they might have a driver's licence, but if they're in another province and they're moving, it's difficult for them as well to establish their place of residence.