That's so sad that someone lost their life. Hopefully they didn't have to suffer and it was instant.
The reality is that people feel like they are invincible. If you look at some of the videos you'll see how fast people were traveling in that ridiculous storm, then when they had to do an evasive maneuver, they had no idea how to handle it. Plus, i'm sure most don't have snow tires, chains, and so on...