There is also the factor that Canada has been propping up unsustainable dead end industries on a massive scale for years, and that this will make any pain from such a situation, deal or no deal, that much worse.
Most obviously Southern Ontario is living in a dreamland where inexplicably ICE autos remain a viable industry ad infinitum.
Some forced reality, by any means, will in the long run prove to be welcome.
Autos are more obvious than the dairy industry, even though Trump claimed a couple of days ago that the reason there was an imminent deal is because Canada allegedly agreed to eliminate dairy tariffs? Trade negotiations have stalled almost certainly because Canada isn't actually willing to give up dairy tariffs.
That will continue with only cars made in Canada not having Canadian tariffs. You make 100,000 cars in Canada everything above that amount is subject to tariffs.