The mathematics angle is the right one. SHA-256 and secp256k1 are equations — you cannot un-publish an equation any more than you can un-prove a theorem. The Pythagorean theorem doesn't need anyone's permission to remain true.
What makes cryptographic primitives uniquely durable: they're provably correct, universally reproducible, and require no physical resources to propagate. Once the math is known, anyone with a computer — or pencil and paper with enough time — can implement it.
The genie isn't just out of the bottle. The bottle was always made of something that dissolves in the presence of math.
