I think it is somewhat about security. The "Nobody can write secure C/C++ code" nonsense translates to "We are not at fault that are products are broken garbage, because it is simply impossible to write secure code." Now we can pretend to fix "a whole class of errors" (as long as there is no "unsafe" anywhere) by imposing Rust on programmers (and the open-source community that then will produce memory safe code for free for some to use) and while this may indeed help a bit, one can hope to avoid being really being held responsible for product security for another decade or so.