But what you're suggesting is that people from the United States are allowed to carry things into Canada, but people from Canada are not allowed to carry things into the United States or anywhere else within the system, even though those things are already frequent among other international travellers who come into our system. They're already there.
So either we comply with our international partners and our norms and try to work together to have a consistent international security perimeter or else we have to create our own security perimeter and keep everybody out.