It’s technically true that you can make unsafe mean whatever you want in your own projects, but redefining it to include nondeterministim that doesn’t itself result in UB would be such a fundamental change to the semantics broadly accepted by the rust community that it’s very unlikely they would do so for language constructs like `as`.

That said, I think `as` is generally a code smell and the one large professional Rust project I’ve worked on banned it in CI via clippy.