You’re right usually (about not needing blizzaks) but there’s important nuance here. There are warm all season (with usual M+S stamped on, this just means tread pattern, nothing about compound) and winter all-season with a compatible compound for cold conditions. The industry created a logo for the tires some years back it’s like 3 peak mountain snowflake or something. This ensures the compound is soft enough to keep gripping in freezing temperatures. It’s required in some jurisdictions (Quebec I think and maybe some lake effect zones)

Difference is pretty big if it’s icy like breaking 100 meters vs 10 meters. Especially if there’s wildlife like reindeers/moose’s you are going to do emergency breathing semi regularly.