Yes, that is a possibility.
We live in a country that has four seasons, one of which is hell. During the other three seasons, we could function normally. Several industries are seasonal and Canada Post could also make seasonal arrangements. Community mailboxes would function year round, but in the winter, we could sign up for door-to-door delivery. Some criteria would have to be established and it would be relatively easy. In that way we would not have to deal with all of this circus.
There is already a program for disabled persons, who have a parking permit and are used to this type of process. Seniors as of the age of 70 are asked to undergo a medical examination every year in order to be able to keep their driver's licence. This could be done in connection with that, but not everyone has a driver's licence. We would have to find other means so that Canada Post could trust the people selected.