That's very impressive! I desperately wish more people did their production work like you do.

I genuinely can believe that Rust, Carbon, &c wouldn't make much of a difference for you. But for others who don't exercise the same discipline (for whatever reason, internal or external) I think they can. I agree there are no silver bullets; that's why each little bit helps.

edit: I think our software woes have mostly to do with human nature; solutions (if they exist) will primarily be educational and social, not technical. But universal computers are less than a century old, and we can certainly do better on both fronts. If we've learned something about the way most people write programs and interact with existing tools, we perhaps ought to make of use of that experience to design better languages and tools.