Quite agree, but then I also feel that all season tires should be taken out back and shot in the dark of night
All season just means they handle all seasons with a great degree of mediocrity.
If you're driving a non-snow tire on icy roads that don't have snow on them, then reducing their pressure may help. The minute you hit a snow drift, though, you may find yourself in trouble. I prefer to run snow tires on my winter car, and if the road is icy I just slow down. Admittedly, the slowing down part doesnt' seem to be practiced by very many minnesotans