Currency controls are the most effective mechanism we currently have. I don't see this idea as absurd at all.
Ok, your previous comment seemed to imply that the only alternative to monetary policy was violence/war, that sounded absurd. Now you seem to confuse currency controls with monetary policy? Anyway, maybe it would be a good idea to read about lists of economic policies to get a better view of the matter?
Said like somebody who never had a problem with the financial system and had access to banks for their entire life. It's great that money works for you, for most people on this planet the same can not be said.
> where governments no longer are able to use the soft power of economics to react to other countries
The idea that monetary policy is the only way to influence economics seems kind of absurd? You're surely not suggesting that removing fiat currencies would remove economics from the world of politics?