The state space of what you must check to ensure correctness in physical engineering is infinitesimal compared to ensuring correctness in software. Correctness in software is qualitatively more difficult by nature and an open problem at a theoretical level.

No amount of bureaucracy and process theater gets around this fact. There is a vast and very expensive gap in software between "don't do stupid things" and "this is actually correct". The tooling to close this gap is severely deficient and not for lack of trying. In physical engineering we've had automated design checking for decades because it is a relatively trivial problem in those domains.

It would be great if compilers could generate proofs but after decades of research they can't even generate SIMD code in most contexts.