In the cold war era, the government didn't even want cryptography to become generally available. I mean, what if Soviet spies use it to communicate with each other and the government can't decode what they're saying?

People who are worried about technology killing people ought to focus their efforts on the technologies that we actually know kill people, like guns and cigarettes. (Oh but, those industries are donating money to the politicians, so they conveniently don't care much.)