Cost kind of stops the government from sending goons right now, sure some governments do it but, it's costly at scale.
The UK gov has shown to be incredibly efficient at arresting and imprisoning citizens for social media comments.
The cost effectiveness is the intimidation and chilling effects on a wider population, when that can be achieved with a small number of actual goons.
Missiles are a lot more expensive and much less reusable than goons though. If the nation state can’t afford the goons, it can’t afford to missile you either