I hate it when people downplay the importance of things. Believing something doesn't make it true!
Most of this happens within hours, sometimes less. We don't have the time to stop and put on snow tires. And if you'll notice in the video, very few if any drivers have snow tires on or are in AWD vehicles. Life simply goes on as is.
On US 550, "the million dollar highway," it's two lane and mountain passes crest 14,000 feet, no guard rails and nothing but ice and snow packed. Some sections, have drop gates to close the highway also. If you get caught between them, you're there as longs as they are closed and go to the nearest mountain town and stay till they are opened up again. AWD isn't going to help you, nor are snow tires.
In those situations, winter tires could safe lives by shortening the braking distance and AWD will give you the extra bit of traction you need compared to 2WD.
But feel free to tempt fate!