

Canada’s economy has never been about using our resources, it’s been about trying to find ways to sell resources to others, so that they can make products and sell those products back to us.
And us applying tariffs on China is almost entirely about US interests, not Canadian. Just look at EVs, and how we block Chinese EVs to protect US auto makers, under the guise of a “Canadian industry” that doesn’t exist. Doug managed to screw the entire country out of cheap, high quality EVs by trotting out an “Arrow” vapourware car that was only ever intended to be used to prove to US/international auto makers that Canada can make the various components that go in to an EV – ie. a fancy brochure / proof of concept to try and suck up to US car makers.
Shipping by rail is generally quicker, at a relatively low price point, and with far less ecological impact.
Shipping things like produce via sea to/from Mexico would likely result in a lot of spoiled food. Larger non-perishables it ‘might’ work, but you wouldn’t bother if you have a cheap, less damaging and quicker option available.