Tires are key! Let's get off this common sense garbage that people argue just to comfort themselves (personally here in CO I consider all those driving A/S tires absolutely stupid).
Real-life does not work that way. You can have a dry road, drive posted limit, and hit a patch of ice or snow behind curve. Snow tires are much more capable in really cold conditions in dry than anything All season.
You can still drive slow with snow tires, but if you think you will compensate lack of traction and braking capabilities of snow tires by driving "slow," you fall into that group that thinks if they wish hard enough, it will happen.
Have been driving winter snowy roads for decades with zero accidents on all season tires.
That's not "think", that's
know, and that is
real life that worked that way.
There is no argument that in some situations, winter tires have more traction. There is also no argument, that road tread, winter tires, are worse for loose pack snow. You want to take the "what if" some sudden patch of ice or snow", but one of those two is snow. "What if" you have road tread winter tires and do come upon snow that isn't hard packed?
It really is about slowing down. If you don't feel that way, you must not be slowing down, so you are at greater risk with winter tires than someone who slowed down (more) with all season, because of the very thing you mentioned, unexpected sudden patches of bad pavement.
Again, I not only think, but do, compensate for less traction and braking by slowing down. It has worked for many years. It would be madness to do anything else because if you don't slow down you are driving faster than other traffic which in itself presents dangers, as does any wreck you have going at the higher speed because you didn't slow down.
The thing to remember is it is all about the environment. In extreme environments where it is very cold, winter tires matter more, but that is still offset by the speed of travel. Believe it or not, people used to manage to travel in winter with tires that had far worse traction than they do today.
It is not a miracle that this happened, rather it was accepting reality instead of placing all bets on type of tire and not driving where the vehicle wasn't capable of going safely. Will it be a consolation if your tires have perfect grip but it is someone else that slides and slams into you? No, but it may be a consolation that you are going slower so the impact severity is reduced.
On the other hand, if someone is a bad driver, they need all the help they can get and yet, that includes the vehicle type or better yet, to be told to stay home when weather is more than they can handle.