As a Canadian who's spent a few years in the southern states, I can say that the difference in infrastructure here does help reduce the risks of road accidents when there's snow. In the south the entire city shuts down because the people there don't have the snow plows, road salt, and winter tires to deal with it. However, in a really bad storm the reduced visibility and slippery roads can still make your drive very dangerous.

Yes, but there’s only so fast that so many plows can clear so much snow. Horrendous road conditions are still very much a reality.