I like to think of different grades of food as just being different and accept them for what they are, within reason. I don't want to get food poisoning or eat only junk food, but I don't expect a newsstand pretzel to knock my socks off, and that's okay. We can't eat fancy gourmet food every day, or at least most of us can't, but that's what makes it a special treat. So, enjoy your grocery store sushi with pride! ;)