Yeah, well, those using suppressors in Europe are so heavily restricted they can't even use their guns for self defense in their own homes... not a great example.
Why is that relevant to your argument? You asserted that suppressors were only good for assassination and poaching; yet these countries chose to mandate their use. There are only two logical conclusions:
1. These countries wish to promote poaching and assassination
2. Your assertion is untrue and there is some desirable public benefit these governments are trying to achieve
And speaking of self-defense, that is a great place for suppressor usage. Firing a gun without hearing protection in an enclosed space while you try to communicate with family and 911? Sure would be nice to have a device that made your firearm hearing safe and could be left attached to the gun.