Yeah, in conditions like those, you need at bare minimum, studded tires and AWD/4WD.
It's best to have chains though because you can't beat, the traction on ice and snow.
Many stretches of road here legally require chains in the winter. If you get in an accident without them on, you get fined.
I've never understood the West's preoccupation with chains. They are illegal in NY, and no one is sliding
around like that. I don't know anyone who has studded tires either. Ok, I'm sure in the mountains, they
make sense, but in Portland?
If you are caught in those sort of conditions without proper snow tyres and/or 4WD, you are screwed.
Realistically they shouldn't even be trying to drive in those conditions with the tyres they have on. Once they realize that they can't steer, can't brake, they panic.
I (and damned near everyone in the NE US) have driven in a lot worse than that pretty regularly with nothing more than radials.
Sure, you can do donuts in the parking lot (although I do remember being in the car for a surprise 180), but so long as you're
careful, and aware that there is ice, you only slide a little here and there.
This is people driving who've never dealt with icy conditions, is all I can think.