I've had winter tires, and tried to drive on ice (not intentionally). Were they better than all-weather tires? Maybe. Didn't try to do a direct comparison.

Did the experience suck hard? It really did. I happened to get really lucky, and there was no one around, and I just ended up spinning around and pointing the wrong way, so I very carefully turned back around and went on my way.

But however much they may help, trying to claim that winter tires are good enough that we can use them instead of proper road treatments is irresponsible and dangerous. And I say this as someone who is extremely upset at the environmental toll standard road salt takes every winter.