Welcome to the forum, best to put on your flame suit now.
You own a 'performance sedan', and a hopped up verson of the model to boot. Yes, it's a Subaru, which are favored by the granola and rainbow crowd for their all season reliability, but that crowd didn't buy the Spec B.
The Spec B crowd wanted serious performance, and summer tires help wring out all that performance.
Best to keep the summer rubber for 2.5 seasons, and buy a set of dedicated winter rubber for the other 1.5 seasons.
This is what the Subaru engineers and marketing team figured the Spec B customer would do. Same with the STi crowd.
Can you imagine how much worse the performance specs of the STi would be if the magazines tested it with average all-seasons on it? Goodbye slalom speed, G-force score, 1/4 mile time and braking distance.
If you wanted big cushy sidewall tires like on a Buick or Camry, you likely bought the wrong car. Low profile tires also help immensely with overall performance but I figure you know that.