> I saw a figure recently that the US issued an all-time-high 800,000 TN visas to Canadians in 2016. And then in 2023 it surged to nearly 1.3 million.

This citation is an order of magnitude off. The US doesn't really track/release visa numbers well, what you're citing might be the number of individual entries using a TN visa - visaholders go back and forth, it's not the total number of visa holders.

DHS estimates 130k Canadian visaholders in country in 2024. https://ohss.dhs.gov/topics/immigration/nonimmigrant/populat...

Canada has 22m workers, so 130k working in the States is nothing like what you're claiming.

>their entire economy

Resource extraction is about ~10% of GDP, compared to 3-5% in the US and 1-2% in mainland Europe. Scandanvian countries have comparable resource extraction % of GDP. It's hardly the entire economy. It's also diversified resource extraction, it's not dependent on oil, etc. Your claim is overblown.