What a load of nonsense. A little bit of humility and a basic understanding of history should quickly make you realize that.
OPs point is far more interesting and deserves more discussion
The idea of "cryptographically signed photos coming out of cameras"? It's been discussed to death and is essentially a hope for magic technology to solve our social problems.
Also it won't work, technically: it's like asking for perfect a DRM implementation to be universally implemented everywhere.
It's immensely frustrating to dress up a natural language sentence with enough precision to try and account for all and every bit of nuance, so you should anticipate and actively consider that I have missed or implied some.
Despite this, you clearly did not, and instead went into attack mode on the assumption(!) that I did miss them intentionally.
I'd recommend you take your own advice on intellectual humility before offering it to others.