There are many more examples all around the world like that. It's just that we don't apply the same rules in order to keep the supply chain going, which is needed to keep civilization going and not going into a SHTF scenario. At least here in Canada, meat processing plants is another one of those examples. They had a real issue with that in the beginning where too many plants were shut down due to infections. It's the same in Germany for example. It's low paid labour. Usually done by people from Eastern Europe and they live crammed together while in Germany and they have a steady flow of people coming and going to flout rules about paying for proper social insurance and such, so you have a steady exchange of potential Covid-19 carriers between countries that have lived and worked in ideal conditions for large outbreaks. But you know, people gotta eat and eat cheap!
We did briefly have that with the border between the UK and the EU. It soon got resolved.
It strikes me as cognitive dissonance and rigid thinking that capitalism equals always bad ior global connections equals always bad and spitefully trying to find something to justify their dogma.