You're confused by the word 'unsafe', which is a misnomer. Rust. The point of 'unsafe' is to indicate that the compiler should be extra careful when compiling the code, because you're about to do something that only a C/C++ programmer would do. Rust sees this and is extra careful. As in your quote, the compiler makes sure we're not using it incorrectly. Rust.
>is to indicate that the compiler should be extra careful when compiling the code
No, it disables some static analysis making it less careful when compiling. Please reread the chapters I linked to you because it seems like you fundamentally misunderstand what unsafe rust is. I'm happy to answer any questions you may have to clarify it.
