He didn't enable "Stripe Tax for Canada". He enabled Stripe Tax.

The whole selling point of Stripe Tax is that it calculates tax for customers in every supported location. It needs customer location to function. He's supposed to charge tax in other locations where it's required too.

Using Stripe Tax to only handle tax for customers in the home region of the company when the company also sells outside the home region seems like a strange goal.

Missing the forest for the trees.