Friday I got a parcel from China in my mailbox, because it was sent via normal mail, not UPS/FedEx.

My daughter was opening a bank account with a partner, they needed ID and a utility bill that had the mailing address printed on it. Paper address mailings are also used for citizenship and other matters as a way to help ensure you are in the country and picking up mail, rather than online fraud.

For CRA password account reset they paper mail you a code to stop online scams.

Court notice papers can legit be served by mail.

My strata ( by law ) has to mail certain documents like AGM info to residents, as electronic notification doesn't count for some specific things.

And so on.

As for your e savvy person. Great. My my old aunts don't have a cell phone or computer.

Also say you can't afford and ISP, you can't get electronic info at home, but mail comes free