What’s funny is that in Europe they are perfectly legal over-the-counter and their use is encouraged to keep the noise down.
Keeping firearm noise down has a legitimate function, as you stated. Law abiding gun users must be allowed access to that legitimate function.
If the lawmakers are freaking out about ‘silencers’ being used by bad guys, they’ll need to outlaw anything and everything that can be used or converted for that purpose, including mundane items like paper towel rolls.