This is sort of the exact opposite of reality: the point of safe Rust is that it's safe so long as Rust's invariants are preserved, which all other safe Rust preserves by construction. So you only need to audit unsafe Rust code to ensure the safety of a Rust codebase.
(The nuance being that sometimes there's a lot of unsafe Rust, because some domains - like kernel programming - necessitate it. But this is still a better state of affairs than having no code be correct by construction, which is the reality with C.)
(The nuance being that sometimes there's a lot of unsafe Rust, because some domains - like kernel programming - necessitate it. But this is still a better state of affairs than having no code be correct by construction, which is the reality with C.)