DVDs have region locking. The United States and Canada happen to be in the same region, and there are bypasses, but technical controls against importing digital goods are already normalized, and I doubt this analogy will convince policymakers.
The only "control" here is that it's assumed you don't have a copy of the DVD spec and don't realize what the lock consists of. Ignoring it suffices to bypass it.
then why is bell canada whining about VPNs, if they're normal and accepted?