Kind of sensible to require cars have proper tires; also from an insurance point of view.
The amount of snow we get is never anywhere close to those American phenomena I see sometimes in the news, where snow gets half way up your front doors nearly overnight. Seeing that, I'm surprised to read that most people don't use snow tyres in such places : it feels like going against common sense even on an purely individual level.
https://www.cbsnews.com/news/atlanta-other-parts-of-south-pa...
This doesn't apply everywhere though, and people are require to use common sense and use the tires (and chains) that are best for where they live.
[1] - https://www.stavanger.kommune.no/en/waste-and-environment/mi...
a) more particulate pollution from tire residual (which can be massively worse than pollution from exhaust in cities)
b) more exhaust pollution from worse car mileage
That said, I didn't buy them until I had a long commute after graduating from college, since I could get around well enough in the college town only needing to go a few miles to the grocery store and such.
Now, mid and post pandemic, I'll probably only maintain a set for one vehicle since that's all I'll be driving in ugly weather, since I'll be staying home whenever the weather is even vaguely questionable.
...and I wasn’t even the most broke of my friends, all of whom drove every day (because how else do you get to work?).
In general owning a car in Canada is significantly more expensive than my experience in the states. Gas is currently $4.82USD. My insurance is close to double what it was in the US. And there is 12% sales tax on vehicles in BC.
The flip side is that in the cities, transit is much better. A lot of my Canadian friends (mostly Vancouver and Toronto) didn't get their first cars until their mid twenties because it is faster and cheaper to use transit for a lot of purposes.