If that's all it was then you would be correct, only nasty folks would be against it. But that's not all it is, or even the main thing it is. The same qualities that make it useful for your friends during a war also make it useful for various sorts of crime, but all the time not just under (what should be) highly unusual and dangerous circumstances.
The fight here is all of us against the dictators and warmongers. If we work to create a "fair, open, censorship-resistant, global financial system" together we can do that without enabling scammers and crooks.