How do you figure they have to be told? You just decided this, maybe because you have common sense and others don't? And how did you come to the conclusion that common sense died anyways?
If people are to stupid/cheap to get them on their own, then they have to be told. As far as common sense and it's death is concerned, do you interact with society at all?
Nobody used snow tires "a long time ago" when according to you common sense was prevalent. You acknowledge we don't get much snow on our roads but whine about cold roads and tire compounds. Is that the common sense part? Because all season tires are actually designed for sub-zero temperatures, don'tcha know? Sure, winter tires are better suited to cold temperatures, but they are also much worse for warm temperatures. There are tons of people who run winter tires all year, I know of a handful from work myself. Are you gonna propose then that we force everyone off their winter tires at a particular date? In that case, they should be forced to run performance tires since all-seasons are a compromise in the summer too, right?
As noted by others, all season tires are not designed to perform in sub zero temps. Winter tires are. That's one of the key differences other then tread design. There would be no reason to prevent someone from running winter tires in the summer. Whats your point?
I used to run high performance tires in the summer, and then I'd switch to all season in the winter. Didn't stop me from running circles around other drivers on snow + ice even in my RWD car. Now I run all seasons... wait for it... all seasons! I use my car for errands when I need to, I don't rely on it every day. Is it common sense for me to put winter tires on for the 1-2000 km I do in the winter even though I've avoided all wet/snowy conditions the past two winters?
Yes it does. Just because you try to avoid driving in the worst of the weather doesn't mean you may not encounter some weather while you are already out. And last time I checked it was pretty much cold all winter long no matter weather it was snowing or not.
What you call common sense is just arrogance. You think you know it all, it's so obvious to you, and poor old you, you have this tough burden of thinking that everyone needs it spelled out for them. I certainly don't, thank you.
It's arrogant to think that just because what you do somewhat works that there is not a better way.
As for everyone else, there is no clear benefit to forcing people to run winter tires as I explained above. But there certainly are clear drawbacks in increased costs of living and bureaucracy. Yet your common sense is to force it on people anyways. What irony.
Swing and a miss slugger. As mentioned all over this thread the benefits of winter tires are clear. There is almost zero increase in cost of living. The only extra cost steel rims or swapping the rubber over on your stock rims that most tires places will do for free if you buy the tires there. As far as bureaucracy is concerned, I don't hear you complaining about that seat belt "The man" says you have to wear. Back in the day cars did not even come with seat belts. People got around just fine with out them.
Unrelated,
Mandated winter tire use in Ontario should by all means reduce the number of accidents and insurance claims. This should (but thanks to greedy companys probably won't) mean lower insurance rates for all of us.
If you have to choose between buying winter tires or putting clothes on your child's back then maybe ownership of a vehicle is not for you.