You make a really interesting analogy, essentially you are saying “If crypto were illegal, only criminals would have crypto”. But my recollection of how the crypto wars were lost (by government, won by the people) is that when government made crypto illegal, they turned anyone who cared about privacy into a criminal: we all started importing our strong crypto from countries where crypto was open sourced and provably not back-doored. Sometimes it was imported on a T-shirt. But the internet also had a hand: mostly strong crypto was simply downloaded. Steven said that “math can’t be censored”, but not for lack of trying on the government's part. We have to give some credit to the Internet too, for making censorship obsolete.