Your last point is entirely backwards and missed the scaling concept entirely. I suggest you watch a documentary on the Model T. The point being that these aren't civil projects once it's modular. The prices and material are what's being optimized. To compare to large RPVs and BWRs efficiency is idiotic as that's the only place they beat SMRs and the known downside to SMRs which is the point of scaling it.

It has always been a regulatoryu issue. As given by the fact Valar has a microreactor currently running just to disrpove your thesis.