You definitely don't need winter tires; all-season tires work just fine. And an ice scraper (or even a shovel) isn't a burden for motorists. Also, winters in Copenhagen are probably quite a lot warmer than many places in the U.S. (the lowest average monthly temperature is barely below freezing!). Quite a different story from Chicago, Detroit, Minneapolis, or Des Moines.

Yeah, you actually need winter tires. All season tires are garbage.

I’m guessing you’re not accounting for wear. I can’t tell the difference between my all seasons and winter tires, but the performance gap between summer tires and all seasons (in winter conditions) is enormous.

Wear matters a ton. Winter tires are usually made of very soft rubber to maintain pliability below freezing. Driving them when it gets warm destroys them quickly.

I'm not sure if you meant that as a rebuttal or not, but I completely agree. :)

Depending on the weather, yes you do need winter tires. All-seasons are a compromise, and the only actually good ones wear out really quickly.

I've scrapers are not a burden to carry in a car, but they do cost money, and require physical effort to use.

You should visit Copenhagen in the winter, and enter a dimension of slush, the freezing/thawing cycles make it extremely unpredictable to ride or drive in. Actual steady freezing temperatures are so much easier to deal with.