Yes, but USA all-season aren't really winter tires as you would know them.
They're harder than USA-summer tires (which are soft for performance at higher temperatures) to last longer, but have more grooves and sipes for slight winter grip. I believe they use more synthetic compounds for efficiency and cold weather performance vs natural rubber for grip.
What makes winter tires different?
www.engineering.com
Looks like low rolling resistance needs high silica.
And yes many Americans drive on substandard all-seasons when they should be driving winters.
But there are many populated areas (like almost all of California where people like me live) which have little to no need for winter tires. In fact I could easily (and might prefer) to drive a EU summer-but-touring-tire but this is an unavailable unicorn, even though Southern California has more people than Sweden + Norway + Finland.