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.