But that's what I mean when I say driving to the conditions. At that point, there was clearly too much snow or ice on the ground to enable the safe operation of the car, and you shouldn't have been driving it. Winter tyres help, no doubt, but they're no substitute for common sense. No offense meant!
If you live in an area where there's lots of snow often, then a cheapy FWD or 4x4 shed is the way to go. If you live in the south where we only get a few bad days here or there, just leave the car at home.