There is a most common counter argument that nobody will sentence a producer of knife, gun in prison if someone else bought a knife, a gun and use it to kill somebody. This makes sense and logic but governments with their power in hands, don't want to interpret things and procedures like this. If they don't like a kind of service, like mixers, they will arrest the service providers and sentence them in prison for years.
I saw on twitter today that the intense prosecution of Tornado Cash developers and pressure to convict them by the US is reasonable given that a major user of the service had become North Korea.
It starts to become geopolitical issue, no longer about legality of a service, product like mixer. If a mixer is used by anyone, any entity but criminals from North Korea like Lazarus group don't use it, governments will not cooperate at global scale to seize a platform and will not sentence the owner, operate in prison.
it is not fair and does not make any sense at all but again they are governments.
But for the United States to maintain its status as a global leader, people have to suffer.
Things start to become worse, with less space for privacy while privacy matters for all of us.