I fail to see how a suppressor only being useful as an accessory for shooting doesn't make it a common sense accessory (for shooting). They're common sense in the same way that wearing a mask when you're sick is common sense. A mask helps prevent you from getting other people sick, it doesn't protect you from getting sick. Wearing a mask isn't "not common sense" because it only works while you're sick and not all the time.
It's like scraping snow and ice off your car. Cleaning your windshield will let you see when you drive, but cleaning off your roof will prevent a sheet of ice from slamming into the car behind you on the highway when the wind catches an edge, or will save you from having it slide down onto your windshield the next time you slow down and blind you. Calling a snow scraper a common sense accessory isn't a stretch because a lot of the world never sees freezing temps or snow. Tools are made to be used in context, and within that context it can be common sense to use them for that purpose.