This is actually found in most video games, and is not depicted correctly at all, is a sign of poor execution overall and discrepancy with the technicality of firearms.
As long as the game has weapons/arsenal that depicts or needs to depict/replicate as close as possible to the real ones and technicalities along with physics, the suppressor needs to at least not alter the weapon damage at all. In reality, an attachment as a suppressor to a weapon has a boosting effect. Boosting accuracy and reducing recoil.
Every person who has literally wielded an actual firearm knows this. And since the game development has also folks from the United States in its team (credits say it) your ability to use and handle firearms can test that in a safely manner.
This would not hinder or affect or mess with the balance of the game, at all. As not all firearms can actually equip a silencer and the Hunters actually have a lot of gain generally.