I think companies that do actual life/death safety critical software should hire dedicated software people instead of relying on closed-source proprietary visual programming tools for mechanical engineers.
These languages bring a lot of key guarantees that you can't (easily) get from more classical languages like bounded memory usage, hard real time guarantees, numerical properties, ability to prove theoretical properties about the model etc...
It's also not like having your code written as a text file would save you from using closed source proprietary compilers or languages (Ada, Ferrocene, various C distributions) for safety-critical software.